chore: bump concurrently from 5.3.0 to 7.6.0

Bumps [concurrently](https://github.com/open-cli-tools/concurrently) from 5.3.0 to 7.6.0.
- [Release notes](https://github.com/open-cli-tools/concurrently/releases)
- [Commits](open-cli-tools/concurrently@v5.3.0...v7.6.0)

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

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

package.json

@@ -58,7 +58,7 @@
     "babel-core": "7.0.0-bridge.0",
     "babel-loader": "^8.0.0",
     "babel-preset-env": "2.0.0-beta.2",
-    "concurrently": "^5.0.0",
+    "concurrently": "^7.6.0",
     "css-loader": "^3.0.0",
     "extract-text-webpack-plugin": "^3.0.0",
     "node-sass": "^9.0.0",