fix: improve golang detector regexp

[mrexox]

:zap: Summary

Extend regexp for golang coverage to allow dashes in repo names

:ballot_box_with_check: Checklist

• [x] Add specs

[coveralls]

Pull Request Test Coverage Report for Build 4626714124

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 89.774%

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Totals
Change from base Build 4626632651:	0.0%
Covered Lines:	676
Relevant Lines:	753

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💛 - Coveralls