chore(package): update mocha to version 7.1.1

Closes #42

Author: greenkeeper[bot]

package.json

@@ -62,7 +62,7 @@
     "eslint-plugin-import": "^2.18.2",
     "eslint-plugin-jsx-a11y": "^6.2.3",
     "eslint-plugin-react": "^7.14.3",
-    "mocha": "^6.1.4",
+    "mocha": "^7.1.1",
     "nyc": "^14.1.1",
     "pg": "^7.12.1",
     "pg-hstore": "^2.3.3",