fix(package): update @nestjs/core to version 7.0.13

Closes #185

Author: greenkeeper[bot]

package.json

@@ -104,7 +104,7 @@
     "@angular-devkit/core": "7.3.9",
     "@angular-devkit/schematics": "7.3.9",
     "@nestjs/common": "7.0.13",
-    "@nestjs/core": "6.1.1",
+    "@nestjs/core": "7.0.13",
     "@nestjs/passport": "6.0.0",
     "@nestjs/platform-express": "^6.1.1",
     "@nestjs/swagger": "^3.0.2",