Bump esbuild from 0.14.54 to 0.15.6

Bumps [esbuild](https://github.com/evanw/esbuild) from 0.14.54 to 0.15.6.
- [Release notes](https://github.com/evanw/esbuild/releases)
- [Changelog](https://github.com/evanw/esbuild/blob/master/CHANGELOG.md)
- [Commits](https://github.com/evanw/esbuild/compare/v0.14.54...v0.15.6)

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

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

package.json

@@ -83,7 +83,7 @@
     "concat-files": "^0.1.1",
     "d3": "~7.6.1",
     "editor-layer-index": "github:osmlab/editor-layer-index#gh-pages",
-    "esbuild": "^0.14.17",
+    "esbuild": "^0.15.6",
     "esbuild-visualizer": "^0.3.1",
     "eslint": "^8.8.0",
     "fetch-mock": "^9.11.0",