chore: update dependency lerna to ^3.20.2 (#936)

Co-authored-by: WhiteSource Renovate <renovatebot@gmail.com>

Author: renovate[bot]

@commitlint/config-lerna-scopes/package.json

@@ -26,7 +26,7 @@
   },
   "homepage": "https://github.com/conventional-changelog/commitlint#readme",
   "peerDependencies": {
-    "lerna": "^3.0.0"
+    "lerna": "^3.20.2"
   },
   "dependencies": {
     "import-from": "3.0.0",