Bump coveralls from 3.0.6 to 3.0.8

Bumps [coveralls](https://github.com/nickmerwin/node-coveralls) from 3.0.6 to 3.0.8.
- [Release notes](https://github.com/nickmerwin/node-coveralls/releases)
- [Commits](https://github.com/nickmerwin/node-coveralls/commits/3.0.8)

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

package.json

@@ -25,7 +25,7 @@
   },
   "devDependencies": {
     "axios-mock-adapter": "1.17.0",
-    "coveralls": "3.0.6",
+    "coveralls": "3.0.8",
     "doxdox": "3.0.0",
     "fs": "0.0.1-security",
     "jest": "24.9.0",