fix(package): update @nestjs/platform-express to version 7.1.2

Closes #185

Author: greenkeeper[bot]

package.json

@@ -106,7 +106,7 @@
     "@nestjs/common": "7.1.2",
     "@nestjs/core": "7.1.2",
     "@nestjs/passport": "6.0.0",
-    "@nestjs/platform-express": "^6.1.1",
+    "@nestjs/platform-express": "^7.1.2",
     "@nestjs/swagger": "^3.0.2",
     "@nestjs/typeorm": "6.1.0",
     "@nrwl/nx": "7.8.5",