fix(package): update camelcase-keys to version 6.1.2

Closes #37

Author: greenkeeper[bot]

package.json

@@ -23,7 +23,7 @@
   "dependencies": {
     "belty": "^5.1.0",
     "body-parser": "^1.17.2",
-    "camelcase-keys": "^5.0.0",
+    "camelcase-keys": "^6.1.2",
     "chokidar": "^3.0.0",
     "connect-history-api-fallback": "^1.3.0",
     "connect-livereload": "^0.6.0",