chore(deps): update dependency mocha to v7

Author: renovate-bot

package-lock.json

@@ -55,7 +55,7 @@
     "coveralls": "3.0.9",
     "faker": "4.1.0",
     "json-to-graphql-query": "1.9.0",
-    "mocha": "6.2.2",
+    "mocha": "7.0.1",
     "mockdate": "2.0.5",
     "nock": "11.8.2",
     "nyc": "14.1.1",