Merge pull request nestjs#2141 from nestjs/renovate/conventional-changelog-3.x

chore(deps): update dependency conventional-changelog to v3.1.8

Author: kamilmysliwiec

package-lock.json

@@ -98,7 +98,7 @@
     "chai-as-promised": "7.1.1",
     "clang-format": "1.2.4",
     "concurrently": "4.1.0",
-    "conventional-changelog": "3.1.4",
+    "conventional-changelog": "3.1.8",
     "core-js": "3.0.1",
     "coveralls": "3.0.3",
     "csv-write-stream": "2.0.0",