fix(package): update @nestjs/common to version 6.7.2

Closes #6

package.json

@@ -10,7 +10,7 @@
     "start:prod": "node dist/main.js"
   },
   "dependencies": {
-    "@nestjs/common": "^4.5.9",
+    "@nestjs/common": "^6.7.2",
     "@nestjs/core": "^4.5.10",
     "@nestjs/microservices": "^4.5.8",
     "@nestjs/swagger": "^1.1.4",