Update dependency coveralls to v3.0.8

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
coveralls	devDependencies	patch	3.0.7 -> 3.0.8

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Release Notes

nickmerwin/node-coveralls

### [`v3.0.8`](https://togithub.com/nickmerwin/node-coveralls/releases/3.0.8) [Compare Source](https://togithub.com/nickmerwin/node-coveralls/compare/2ed185ca3626591549ed33c2363a47b824a39d0f...3.0.8) ### Added: - Cobertura support ([@​ly-cultureiq](https://togithub.com/ly-cultureiq)) ### Fixed: - flag_name handling ([@​joscha](https://togithub.com/joscha)) ### Improved - ES6-ified codebase ([@​XhmikosR](https://togithub.com/XhmikosR)) - AppVeyor tests ([@​XhmikosR](https://togithub.com/XhmikosR)) - GitHub Actions ([@​XhmikosR](https://togithub.com/XhmikosR))

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