chore(deps): update dependency mocha to v7 (#105)

Author: renovate-bot

datalabeling/package.json

@@ -18,6 +18,6 @@
   },
   "devDependencies": {
     "chai": "^4.2.0",
-    "mocha": "^6.2.2"
+    "mocha": "^7.0.0"
   }
 }