chore(deps): update dependency core-js to v3.6.5 (#599)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

package-lock.json

@@ -51,7 +51,7 @@
     "babel-preset-env": "1.7.0",
     "clean-webpack-plugin": "3.0.0",
     "copy-webpack-plugin": "5.1.1",
-    "core-js": "3.6.4",
+    "core-js": "3.6.5",
     "cross-env": "7.0.2",
     "css-loader": "3.5.2",
     "eslint": "6.8.0",