Add macos-12 runner for CI.

mirth-lang / mirth

Compiler for the Mirth programming language.

BSD Zero Clause License

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Closed typeswitch-dev closed 7 months ago

typeswitch-dev commented 7 months ago

The change to macos-latest moved macos-14 which runs on arm64. This PR adds macos-12 runner so we don't stop testing on x64-based macs.