fix(deps): pin dependencies

Author: renovate-bot

sample/25-dynamic-modules/package.json

@@ -19,17 +19,17 @@
     "test:e2e": "jest --config ./test/jest-e2e.json"
   },
   "dependencies": {
-    "@nestjs/common": "^6.0.0",
-    "@nestjs/core": "^6.0.0",
-    "@nestjs/platform-express": "^6.0.0",
-    "dotenv": "^8.1.0",
-    "reflect-metadata": "^0.1.12",
-    "rimraf": "^2.6.2",
-    "rxjs": "^6.3.3"
+    "@nestjs/common": "6.6.3",
+    "@nestjs/core": "6.6.3",
+    "@nestjs/platform-express": "6.6.3",
+    "dotenv": "8.1.0",
+    "reflect-metadata": "0.1.13",
+    "rimraf": "2.7.1",
+    "rxjs": "6.5.2"
   },
   "devDependencies": {
-    "@nestjs/testing": "^6.0.0",
-    "@types/dotenv": "^6.1.1",
+    "@nestjs/testing": "6.6.3",
+    "@types/dotenv": "6.1.1",
     "@types/express": "4.16.1",
     "@types/jest": "24.0.11",
     "@types/node": "11.13.4",