Update test dependencies and docs

[aedwardg]

Fixes #2499

Changes

• update golangci-lint to version 1.49.0 (most recent release)
• update contributor documentation with correct script name for running the test suite

Credit to @mikejoh12 for discovering that tests were not working locally for M1 Macs and prompting me to dig into it further.

[github-actions]

Dear aedwardg

Thank you for contributing to the Go track on Exercism! 💙
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_{Automated comment created by PR Commenter 🤖.}

[andrerfcsantos]

Thanks for this!