fix: upgrade cross-env from 7.0.0 to 7.0.1 (#428)

Snyk has created this PR to upgrade cross-env from 7.0.0 to 7.0.1.

See this package in NPM:
https://www.npmjs.com/package/cross-env

See this project in Snyk:
https://app.snyk.io/org/nodeshift-agg/project/95741f2c-ce6f-4d21-a62a-9b9a2d2d3c8e?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -62,7 +62,7 @@
   },
   "devDependencies": {
     "coveralls": "~3.0.6",
-    "cross-env": "^7.0.0",
+    "cross-env": "^7.0.1",
     "documentation": "~12.1.0",
     "eslint": "^6.0.1",
     "eslint-config-semistandard": "^15.0.0",