Update dependency basic-auth to v2

Author: renovate-bot

package.json

@@ -17,7 +17,7 @@
   ],
   "main": "index.js",
   "dependencies": {
-    "basic-auth": "1.1.0",
+    "basic-auth": "2.0.1",
     "bluebird": "3.7.2",
     "lodash": "4.17.4",
     "promisify-any": "2.0.1",