diff --git a/package-lock.json b/package-lock.json
index ce48610..07d6aa8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1066,6 +1066,7 @@
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       "dev": true,
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@@ -1531,16 +1532,6 @@
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-      "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.9.tgz",
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@@ -2261,7 +2252,8 @@
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       "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-      "dev": true
+      "dev": true,
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@@ -2657,7 +2649,8 @@
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       "integrity": "sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o=",
-      "dev": true
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@@ -3601,7 +3594,8 @@
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-          "dev": true
+          "dev": true,
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@@ -3622,12 +3616,14 @@
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           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "1.1.11",
           "bundled": true,
           "dev": true,
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@@ -3642,17 +3638,20 @@
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+          "dev": true,
+          "optional": true
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           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -3769,7 +3768,8 @@
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           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "1.3.5",
@@ -3781,6 +3781,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -3795,6 +3796,7 @@
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           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -3802,12 +3804,14 @@
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           "version": "0.0.8",
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-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "2.3.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -3826,6 +3830,7 @@
           "version": "0.5.1",
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           "dev": true,
+          "optional": true,
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@@ -3906,7 +3911,8 @@
         "number-is-nan": {
           "version": "1.0.1",
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-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -3918,6 +3924,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4003,7 +4010,8 @@
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           "version": "5.1.2",
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-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -4039,6 +4047,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4058,6 +4067,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -4101,12 +4111,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
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@@ -4115,6 +4127,7 @@
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       "integrity": "sha1-XB+x8RdHcRTwYyoOtLcbPLD9MXE=",
       "dev": true,
+      "optional": true,
       "requires": {
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@@ -4127,6 +4140,7 @@
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       "integrity": "sha1-LANAXHU4w51+s3sxcCLjJfsBi/c=",
       "dev": true,
+      "optional": true,
       "requires": {
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         "console-control-strings": "^1.0.0",
@@ -4164,7 +4178,8 @@
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       "integrity": "sha1-uWjGsKBDhDJJAui/Gl3zJXmkUP4=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -4344,7 +4359,8 @@
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       "resolved": "https://registry.npmjs.org/has-unicode/-/has-unicode-2.0.1.tgz",
       "integrity": "sha1-4Ob+aijPUROIVeCG0Wkedx3iqLk=",
-      "dev": true
+      "dev": true,
+      "optional": true
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     "has-value": {
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@@ -5064,7 +5080,8 @@
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       "integrity": "sha1-Sw2hRCEE0bM2NA6AeX6GXPOffXI=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "is-windows": {
       "version": "1.0.2",
@@ -5518,9 +5535,9 @@
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     "karma": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/karma/-/karma-4.0.1.tgz",
-      "integrity": "sha512-ind+4s03BqIXas7ZmraV3/kc5+mnqwCd+VDX1FndS6jxbt03kQKX2vXrWxNLuCjVYmhMwOZosAEKMM0a2q7w7A==",
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/karma/-/karma-4.1.0.tgz",
+      "integrity": "sha512-xckiDqyNi512U4dXGOOSyLKPwek6X/vUizSy2f3geYevbLj+UIdvNwbn7IwfUIL2g1GXEPWt/87qFD1fBbl/Uw==",
       "dev": true,
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@@ -5692,6 +5709,7 @@
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       "integrity": "sha1-lWkFcI1YtLq0wiYbBPWfMcmTdMA=",
       "dev": true,
+      "optional": true,
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         "parse-json": "^2.2.0",
@@ -5704,7 +5722,8 @@
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           "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
           "integrity": "sha1-7RQaasBDqEnqWISY59yosVMw6Qw=",
-          "dev": true
+          "dev": true,
+          "optional": true
         }
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@@ -5979,7 +5998,8 @@
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       "resolved": "https://registry.npmjs.org/map-obj/-/map-obj-1.0.1.tgz",
       "integrity": "sha1-2TPOuSBdgr3PSIb2dCvcK03qFG0=",
-      "dev": true
+      "dev": true,
+      "optional": true
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     "map-visit": {
       "version": "1.0.0",
@@ -6377,7 +6397,7 @@
         "request": "^2.87.0",
         "rimraf": "2",
         "semver": "~5.3.0",
-        "tar": "^2.0.0",
+        "tar": "^4.4.8",
         "which": "1"
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       "dependencies": {
@@ -6387,6 +6407,29 @@
           "integrity": "sha1-myzl094C0XxgEq0yaqa00M9U+U8=",
           "dev": true,
           "optional": true
+        },
+        "tar": {
+          "version": "4.4.8",
+          "resolved": "https://registry.npmjs.org/tar/-/tar-4.4.8.tgz",
+          "integrity": "sha512-LzHF64s5chPQQS0IYBn9IN5h3i98c12bo4NCO7e0sGM2llXQ3p2FGC5sdENN4cTW48O915Sh+x+EXx7XW96xYQ==",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "chownr": "^1.1.1",
+            "fs-minipass": "^1.2.5",
+            "minipass": "^2.3.4",
+            "minizlib": "^1.1.1",
+            "mkdirp": "^0.5.0",
+            "safe-buffer": "^5.1.2",
+            "yallist": "^3.0.2"
+          }
+        },
+        "yallist": {
+          "version": "3.0.3",
+          "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
+          "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A==",
+          "dev": true,
+          "optional": true
         }
       }
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@@ -6600,6 +6643,7 @@
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       "integrity": "sha512-2uUqazuKlTaSI/dC8AzicUck7+IrEaOnN/e0jd3Xtt1KcGpwx30v50mL7oPyr/h9bL3E4aZccVwpwP+5W9Vjkg==",
       "dev": true,
+      "optional": true,
       "requires": {
         "are-we-there-yet": "~1.1.2",
         "console-control-strings": "~1.1.0",
@@ -7611,6 +7655,7 @@
       "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-1.1.0.tgz",
       "integrity": "sha1-9f+qXs0pyzHAR0vKfXVra7KePyg=",
       "dev": true,
+      "optional": true,
       "requires": {
         "load-json-file": "^1.0.0",
         "normalize-package-data": "^2.3.2",
@@ -7622,6 +7667,7 @@
           "resolved": "https://registry.npmjs.org/path-type/-/path-type-1.1.0.tgz",
           "integrity": "sha1-WcRPfuSR2nBNpBXaWkBwuk+P5EE=",
           "dev": true,
+          "optional": true,
           "requires": {
             "graceful-fs": "^4.1.2",
             "pify": "^2.0.0",
@@ -7632,7 +7678,8 @@
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           "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
           "integrity": "sha1-7RQaasBDqEnqWISY59yosVMw6Qw=",
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
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@@ -7641,6 +7688,7 @@
       "resolved": "https://registry.npmjs.org/read-pkg-up/-/read-pkg-up-1.0.1.tgz",
       "integrity": "sha1-nWPBMnbAZZGNV/ACpX9AobZD+wI=",
       "dev": true,
+      "optional": true,
       "requires": {
         "find-up": "^1.0.0",
         "read-pkg": "^1.0.0"
@@ -7651,6 +7699,7 @@
           "resolved": "https://registry.npmjs.org/find-up/-/find-up-1.1.2.tgz",
           "integrity": "sha1-ay6YIrGizgpgq2TWEOzK1TyyTQ8=",
           "dev": true,
+          "optional": true,
           "requires": {
             "path-exists": "^2.0.0",
             "pinkie-promise": "^2.0.0"
@@ -7661,6 +7710,7 @@
           "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-2.1.0.tgz",
           "integrity": "sha1-D+tsZPD8UY2adU3V77YscCJ2H0s=",
           "dev": true,
+          "optional": true,
           "requires": {
             "pinkie-promise": "^2.0.0"
           }
@@ -8953,6 +9003,7 @@
       "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-2.0.0.tgz",
       "integrity": "sha1-YhmoVhZSBJHzV4i9vxRHqZx+aw4=",
       "dev": true,
+      "optional": true,
       "requires": {
         "is-utf8": "^0.2.0"
       }
@@ -9054,18 +9105,6 @@
       "integrity": "sha512-4WK/bYZmj8xLr+HUCODHGF1ZFzsYffasLUgEiMBY4fgtltdO6B4WJtlSbPaDTLpYTcGVwM2qLnFTICEcNxs3kA==",
       "dev": true
     },
-    "tar": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/tar/-/tar-2.2.1.tgz",
-      "integrity": "sha1-jk0qJWwOIYXGsYrWlK7JaLg8sdE=",
-      "dev": true,
-      "optional": true,
-      "requires": {
-        "block-stream": "*",
-        "fstream": "^1.0.2",
-        "inherits": "2"
-      }
-    },
     "terser": {
       "version": "3.17.0",
       "resolved": "https://registry.npmjs.org/terser/-/terser-3.17.0.tgz",
@@ -10289,6 +10328,7 @@
       "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
       "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
       "dev": true,
+      "optional": true,
       "requires": {
         "string-width": "^1.0.2 || 2"
       }
diff --git a/package.json b/package.json
index cc383be..93ef09a 100644
--- a/package.json
+++ b/package.json
@@ -29,13 +29,13 @@
     "@angular/cli": "~7.3.8",
     "@angular/compiler-cli": "~7.2.0",
     "@angular/language-service": "~7.2.0",
-    "@types/node": "~8.9.4",
     "@types/jasmine": "~2.8.8",
     "@types/jasminewd2": "~2.0.3",
+    "@types/node": "~8.9.4",
     "codelyzer": "~4.5.0",
     "jasmine-core": "~2.99.1",
     "jasmine-spec-reporter": "~4.2.1",
-    "karma": "~4.0.0",
+    "karma": "^4.1.0",
     "karma-chrome-launcher": "~2.2.0",
     "karma-coverage-istanbul-reporter": "~2.0.1",
     "karma-jasmine": "~1.1.2",