chore(deps-dev): bump lerna from 6.1.0 to 6.3.0

Bumps [lerna](https://github.com/lerna/lerna/tree/HEAD/core/lerna) from 6.1.0 to 6.3.0.
- [Release notes](https://github.com/lerna/lerna/releases)
- [Changelog](https://github.com/lerna/lerna/blob/main/core/lerna/CHANGELOG.md)
- [Commits](https://github.com/lerna/lerna/commits/v6.3.0/core/lerna)

---
updated-dependencies:
- dependency-name: lerna
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -62,7 +62,7 @@
     "eslint-plugin-import": "~2.26.0",
     "eslint-plugin-lit": "~1.7.2",
     "eslint-plugin-wc": "~1.4.0",
-    "lerna": "~6.1.0",
+    "lerna": "~6.3.0",
     "lit-analyzer": "~1.2.1",
     "npm-run-all": "~4.1.5",
     "prettier": "~2.8.1",