Bump coveralls from 3.0.11 to 3.1.0

Bumps [coveralls](https://github.com/nickmerwin/node-coveralls) from 3.0.11 to 3.1.0.
- [Release notes](https://github.com/nickmerwin/node-coveralls/releases)
- [Commits](https://github.com/nickmerwin/node-coveralls/compare/3.0.11...v3.1.0)

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

package.json

@@ -60,7 +60,7 @@
     "chaikin-smooth": "^1.0.4",
     "clean-css-cli": "4.3.0",
     "copy-webpack-plugin": "^5.0.4",
-    "coveralls": "3.0.11",
+    "coveralls": "3.1.0",
     "eslint": "^6.8.0",
     "eslint-config-openlayers": "^14.0.0",
     "expect.js": "0.3.1",