chore(dev-deps): update dependency chai to v4.4.1

Author: renovate[bot]

package-lock.json

@@ -63,7 +63,7 @@
     "babel-eslint": "10.1.0",
     "babel-loader": "8.3.0",
     "babel-preset-env": "7.0.0-beta.3",
-    "chai": "4.3.7",
+    "chai": "4.4.1",
     "closure-webpack-plugin": "2.6.1",
     "cross-env": "7.0.3",
     "cssnano": "6.0.1",