chore(deps): update dependency mocha to v6 (#269)

Author: renovate[bot]

handwritten/logging-winston/package.json

@@ -78,7 +78,7 @@
     "eslint-plugin-prettier": "^3.0.0",
     "gts": "^0.9.0",
     "intelli-espower-loader": "^1.0.1",
-    "mocha": "^5.2.0",
+    "mocha": "^6.0.0",
     "post-install-check": "0.0.1",
     "prettier": "^1.13.6",
     "require-inject": "^1.4.3",

handwritten/logging-winston/samples/package.json

@@ -20,6 +20,6 @@
   "devDependencies": {
     "chai": "^4.2.0",
     "execa": "^1.0.0",
-    "mocha": "^5.2.0"
+    "mocha": "^6.0.0"
   }
 }