fix: upgrade eslint from 7.11.0 to 7.12.0

Snyk has created this PR to upgrade eslint from 7.11.0 to 7.12.0.

See this package in npm:
https://www.npmjs.com/package/eslint

See this project in Snyk:
https://app.snyk.io/org/randytarampi/project/e095fb25-a87f-4931-a0ba-08adee4c492b?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -39,7 +39,7 @@
     "coveralls": "^3.1.0",
     "cross-env": "^7.0.2",
     "del": "^6.0.0",
-    "eslint": "^7.11.0",
+    "eslint": "^7.12.0",
     "eslint-plugin-import": "^2.22.1",
     "gulp": "^4.0.2",
     "gulp-eslint": "^6.0.0",