chore(deps): update dependency @types/mocha to v7 (#100)

Co-authored-by: Maggie Nolan <[email protected]>

Author: renovate-bot

package.json

@@ -41,7 +41,7 @@
     "split": "^1.0.1"
   },
   "devDependencies": {
-    "@types/mocha": "^5.0.0",
+    "@types/mocha": "^7.0.0",
     "@types/node": "^10.0.3",
     "@types/p-limit": "^2.0.0",
     "@types/pify": "^3.0.0",