chore(deps-dev): bump concurrently from 6.2.1 to 6.4.0 (#1687)

Bumps [concurrently](https://github.com/open-cli-tools/concurrently) from 6.2.1 to 6.4.0.
- [Release notes](https://github.com/open-cli-tools/concurrently/releases)
- [Commits](open-cli-tools/concurrently@v6.2.1...v6.4.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -104,7 +104,7 @@
     "babel-polyfill": "6.26.0",
     "chroma-js": "2.1.2",
     "chromatic": "6.1.0",
-    "concurrently": "6.2.1",
+    "concurrently": "6.4.0",
     "copyfiles": "2.4.1",
     "cross-env": "7.0.3",
     "enzyme": "3.11.0",