Update eslint-plugin-mocha to version 7.0.0

Author: depfu[bot]

package.json

@@ -32,7 +32,7 @@
     "eslint-config-prettier": "^6.0.0",
     "eslint-config-standard": "^14.0.0",
     "eslint-plugin-import": "^2.18.2",
-    "eslint-plugin-mocha": "^6.0.0",
+    "eslint-plugin-mocha": "^7.0.0",
     "eslint-plugin-node": "^11.0.0",
     "eslint-plugin-promise": "^4.2.1",
     "eslint-plugin-standard": "^4.0.0",