fix(package): update @nestjs/microservices to version 7.0.6

Closes #8

Author: greenkeeper[bot]

package.json

@@ -12,7 +12,7 @@
   "dependencies": {
     "@nestjs/common": "^4.5.9",
     "@nestjs/core": "^4.5.10",
-    "@nestjs/microservices": "^4.5.8",
+    "@nestjs/microservices": "^7.0.6",
     "@nestjs/swagger": "^1.1.4",
     "@nestjs/testing": "^4.5.5",
     "@nestjs/websockets": "^4.5.8",