Update coveralls requirement from ^2.11.15 to ^3.0.3

[dependabot-preview[bot]]

Updates the requirements on coveralls to permit the latest version.

Release notes

*Sourced from [coveralls's releases](https://github.com/nickmerwin/node-coveralls/releases).* > ## Dependency security updates > As suggested by NPM and Snyk.

Commits

- [`aa2519c`](https://github.com/nickmerwin/node-coveralls/commit/aa2519c770e298d97e5d54df19f1b738c1ba893a) dependency security audit fixes from npm & snyk ([#210](https://github-redirect.dependabot.com/nickmerwin/node-coveralls/issues/210)) - [`cc67125`](https://github.com/nickmerwin/node-coveralls/commit/cc671251ef01d71bb340bc37336a8cfaae0542bc) bump version; updated .snyk - [`231f12f`](https://github.com/nickmerwin/node-coveralls/commit/231f12f88120dc868b7bcbfcbd27f74d00f8ffaa) Adds support for named job flags ([#196](https://github-redirect.dependabot.com/nickmerwin/node-coveralls/issues/196)) - [`a96ab26`](https://github.com/nickmerwin/node-coveralls/commit/a96ab2674f4ea53978f45e432d9c691a57673934) updated dependencies - [`e7ae2bf`](https://github.com/nickmerwin/node-coveralls/commit/e7ae2bfcb468d47369d885b0cde668b79f6d92b5) version bump; logger test fix - [`9b892bf`](https://github.com/nickmerwin/node-coveralls/commit/9b892bfb66455d425382daa4e07adb654d924c3e) Verbose use log level `debug` - [`9cfb496`](https://github.com/nickmerwin/node-coveralls/commit/9cfb4967c7d80acccd9f06bc890f253953060592) Add buildkite support ([#177](https://github-redirect.dependabot.com/nickmerwin/node-coveralls/issues/177)) - [`aa8c257`](https://github.com/nickmerwin/node-coveralls/commit/aa8c257fec0c093a2560a42e7c5cfd61fde5d16c) Done callback waits for unlink in testRepoTokenDetection to prevent race cond... - [`18c71c2`](https://github.com/nickmerwin/node-coveralls/commit/18c71c2e6d38cd58325250e6f9b34b2e93972b81) Fix a mistype in tests: fs.exists -> fs.existsSync ([#184](https://github-redirect.dependabot.com/nickmerwin/node-coveralls/issues/184)) - [`bd667c6`](https://github.com/nickmerwin/node-coveralls/commit/bd667c617bbf5ff921f6b3734a991cde874db320) Add Semaphore support ([#180](https://github-redirect.dependabot.com/nickmerwin/node-coveralls/issues/180)) - Additional commits viewable in [compare view](https://github.com/nickmerwin/node-coveralls/compare/2.12.0...3.0.3)

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[dependabot-preview[bot]]

Superseded by #51.