chore(deps): update dependency cross-env to v6.0.3 (#446)

Author: renovate[bot]

package-lock.json

@@ -51,7 +51,7 @@
     "clean-webpack-plugin": "3.0.0",
     "copy-webpack-plugin": "5.0.4",
     "core-js": "2.6.9",
-    "cross-env": "6.0.0",
+    "cross-env": "6.0.3",
     "css-loader": "3.2.0",
     "eslint": "6.5.1",
     "eslint-config-standard": "14.1.0",