Upgrade: bump lodash from 4.17.11 to 4.17.19

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.11 to 4.17.19.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.11...4.17.19)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -28,7 +28,7 @@
     "extract-text-webpack-plugin": "^3.0.2",
     "firebase": "4.2.0",
     "history": "4.7.2",
-    "lodash": "^4.17.11",
+    "lodash": "^4.17.19",
     "moment": "2.18.1",
     "node-sass": "4.9.2",
     "normalize.css": "7.0.0",

yarn.lock

@@ -4225,17 +4225,9 @@ lodash.uniq@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
 
-lodash@^4.0.0, lodash@^4.1.1, lodash@^4.14.0, lodash@^4.17.2, lodash@^4.17.4, lodash@^4.2.0, lodash@^4.2.1, lodash@~4.17.4:
-  version "4.17.4"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
-
-lodash@^4.17.10, lodash@^4.3.0:
-  version "4.17.10"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.10.tgz#1b7793cf7259ea38fb3661d4d38b3260af8ae4e7"
-
-lodash@^4.17.11:
-  version "4.17.11"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
+lodash@^4.0.0, lodash@^4.1.1, lodash@^4.14.0, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.19, lodash@^4.17.2, lodash@^4.17.4, lodash@^4.2.0, lodash@^4.2.1, lodash@^4.3.0, lodash@~4.17.4:
+  version "4.17.19"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.19.tgz#e48ddedbe30b3321783c5b4301fbd353bc1e4a4b"
 
 longest@^1.0.1:
   version "1.0.1"