fixing mocha version as the last version no longer supports node 6

Thiago Santos · Thiago Santos · commit 38d749805170 · 2020-06-25T11:02:22.000-03:00
diff --git a/package.json b/package.json
@@ -39,7 +39,7 @@
     "chai": "*",
     "eslint": "^5.1.0",
     "eslint-plugin-node": "*",
-    "mocha": "*",
+    "mocha": "^6.0.0",
     "selfsigned": "*",
     "winston": "*"
   },
