fix(package): update @nestjs/testing to version 7.0.7

Closes #7

Author: greenkeeper[bot]

package.json

@@ -14,7 +14,7 @@
     "@nestjs/core": "^4.5.10",
     "@nestjs/microservices": "^4.5.8",
     "@nestjs/swagger": "^1.1.4",
-    "@nestjs/testing": "^4.5.5",
+    "@nestjs/testing": "^7.0.7",
     "@nestjs/websockets": "^4.5.8",
     "js-yaml": "^3.11.0",
     "lodash": "^4.17.5",