chore(deps): update dependency @nestjs/cli to v6.12.6

Author: renovate-bot

sample/01-cats-app/package-lock.json

@@ -29,7 +29,7 @@
     "rxjs": "6.5.3"
   },
   "devDependencies": {
-    "@nestjs/cli": "6.12.4",
+    "@nestjs/cli": "6.12.6",
     "@nestjs/schematics": "6.7.4",
     "@nestjs/testing": "6.10.2",
     "@types/express": "4.17.2",

sample/01-cats-app/package.json

@@ -35,7 +35,7 @@
     "@types/socket.io": "2.1.3",
     "@types/socket.io-redis": "1.0.25",
     "@types/ws": "6.0.4",
-    "@nestjs/cli": "6.12.4",
+    "@nestjs/cli": "6.12.6",
     "@nestjs/schematics": "6.7.4",
     "@nestjs/testing": "6.10.2",
     "@types/express": "4.17.2",

sample/02-gateways/package-lock.json

@@ -30,7 +30,7 @@
     "rxjs": "6.5.3"
   },
   "devDependencies": {
-    "@nestjs/cli": "6.12.4",
+    "@nestjs/cli": "6.12.6",
     "@nestjs/schematics": "6.7.4",
     "@nestjs/testing": "6.10.2",
     "@types/amqplib": "0.5.13",