Update dependency eslint to v7.15.0 (#641)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package-lock.json

@@ -42,7 +42,7 @@
     "chromedriver": "87.0.4",
     "coveralls": "3.1.0",
     "del": "6.0.0",
-    "eslint": "7.14.0",
+    "eslint": "7.15.0",
     "eslint-config-airbnb": "18.2.1",
     "eslint-plugin-import": "2.22.1",
     "geckodriver": "1.21.0",