Fix ThreadSafety::DirChdir rubocop issue

[viralpraxis]

I've recently implemented ThreadSafety::DirChdir cop (ref) to track Dir.chdir calls. While it's completely safe in gemspec, it can be fixed easily by adopting state-of-art gemspec template (ref)

Dir.chdir(File.expand_path(__dir__)) { %x(git ls-files -z lib).split("\x0") } == IO.popen(%w[git ls-files -z lib], chdir: __dir__, err: IO::NULL) { |ls| ls.readlines("\x0", chomp: true) }
=> true

[sunny]

Thanks for the suggestion and the cop, although not an issue here I was not aware that Dir.chdir was not thread-safe.

I’ll have a look at rubocop-thread_safety!