Fix macOS deprecated API

[Kyle-Ye]

Bug/issue #, if applicable:

Summary

Fix deprecated FileHandle.readDataToEndOfFile, Process.launch and Process.launchPath API on macOS since they can be removed at a future release.

Checklist

Make sure you check off the following items. If they cannot be completed, provide a reason.

• Ran the ./bin/test script and it succeeded

[d-ronnqvist]

Thank you. These changes look good to me 👍

Swift CI is getting set up in this repo for automated testing, so I will merge this after things are configured.

[franklinsch]

@swift-ci please test

[Kyle-Ye]

The test-fail is fixed by this PR #9

After it was merged, we can run test again on this branch.

[franklinsch]

@swift-ci please test Linux

[Kyle-Ye]

Rebased to the fixed-main, should solve the test issue now.

[franklinsch]

@swift-ci please test

[Kyle-Ye]

I assume the env to be Swift 5.0+, but it seems it uses the Package.swift's Swift version which is 4.2 (A very old version). What's your opinion on bumping the swift version to 5.0+. See this PR #4

[d-ronnqvist]

@swift-ci please test

[franklinsch]

Thanks for opening this @Kyle-Ye. Since the blocking PR has been merged, can you please rebase, and I'll kick off CI again here? Also, I filed https://bugs.swift.org/browse/SR-15428 to track the issue you're resolving

[Kyle-Ye]

Thanks for opening this @Kyle-Ye. Since the blocking PR has been merged, can you please rebase, and I'll kick off CI again here? Also, I filed bugs.swift.org/browse/SR-15428 to track the issue you're resolving

Done with rebase. Could you help me run test on this again? Thanks

[franklinsch]

@swift-ci please test

[franklinsch]

Thanks @Kyle-Ye! I will merge this