⬆️ Update dependencies: test packages

package.json

@@ -123,7 +123,7 @@
     "@types/valid-data-url": "2.0.0",
     "@typescript-eslint/eslint-plugin": "2.16.0",
     "@typescript-eslint/parser": "2.16.0",
-    "ava": "2.4.0",
+    "ava": "3.13.0",
     "can-npm-publish": "1.3.2",
     "cross-spawn": "7.0.1",
     "del-cli": "3.0.0",
@@ -147,12 +147,12 @@
     "npm-run-all": "4.1.5",
     "package-version-git-tag": "2.0.2",
     "postcss": "7.0.26",
-    "postcss-import": "12.0.1",
+    "postcss-import": "13.0.0",
     "prettier": "1.19.1",
     "prettier-package-json": "2.1.3",
     "sort-package-json": "1.39.0",
-    "sugarss": "2.0.0",
-    "ts-node": "8.6.2",
+    "sugarss": "3.0.1",
+    "ts-node": "9.0.0",
     "typescript": "3.7.4"
   },
   "peerDependencies": {