chore(deps): update dependency @types/mocha to v7

Author: renovate-bot

package.json

@@ -63,7 +63,7 @@
   "devDependencies": {
     "@types/extend": "^3.0.1",
     "@types/is": "0.0.21",
-    "@types/mocha": "^5.2.6",
+    "@types/mocha": "^7.0.0",
     "@types/mv": "^2.1.0",
     "@types/ncp": "^2.0.1",
     "@types/proxyquire": "^1.3.28",