chore(deps): update dependency mocha to v7

Author: renovate-bot

package-lock.json

@@ -132,7 +132,7 @@
     "lerna": "2.11.0",
     "lint-staged": "9.5.0",
     "markdown-table": "1.1.3",
-    "mocha": "6.2.2",
+    "mocha": "7.0.0",
     "nodemon": "2.0.2",
     "nyc": "15.0.0",
     "prettier": "1.19.1",