Bump coveralls from 3.1.0 to 3.1.1

Bumps [coveralls](https://github.com/nickmerwin/node-coveralls) from 3.1.0 to 3.1.1.
- [Release notes](https://github.com/nickmerwin/node-coveralls/releases)
- [Commits](https://github.com/nickmerwin/node-coveralls/compare/v3.1.0...3.1.1)

---
updated-dependencies:
- dependency-name: coveralls
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -68,7 +68,7 @@
     "clean-css-cli": "5.3.0",
     "copy-webpack-plugin": "^9.0.0",
     "coverage-istanbul-loader": "^3.0.5",
-    "coveralls": "3.1.0",
+    "coveralls": "3.1.1",
     "es-main": "^1.0.2",
     "eslint": "^7.2.0",
     "eslint-config-openlayers": "^15.0.0",