Update fakefs to fix test failures on Ruby 3.2.2

[AliSoftware]

Checklist

• I've run bundle exec rspec from the root directory to see all new and existing tests pass
• I've followed the fastlane code style and run bundle exec rubocop -a to ensure the code style is valid
• I see several green ci/circleci builds in the "All checks have passed" section of my PR (connect CircleCI to GitHub if not)
• I've read the Contribution Guidelines
• I've updated the documentation if necessary.
• I've added or updated relevant unit tests.

Motivation and Context

We kept having NameError: undefined method `=~' for class `FakeFS::Pathname' errors when running the tests (bundle exec rspec) in Ruby 3.2.2 on our Macs.

Description

Updating fakefs fixed those failures that happened running bundle exec rspec on the repo in Ruby 3.2.2.

Initially I updated fakefs to its latest ~> 1.x version, which was 1.9. But then I later noticed (thanks, CI) that fakefs 1.9 requires Ruby >= 2.7, while fastlane still supports Ruby 2.6 (spec.required_ruby_version = '>= 2.6'), so I ended up forcing using fakefs 1.8, which is the latest version of that gem that supports Ruby 2.6 (>=2.4).

PS: At some point we probably want to add Ruby 3.2.2 to our array of Ruby versions tested by CI, but that's improvements for another PR (I think @rogerluan already tried a while ago and encountered some hiccups while trying so paused his work on this?)

Testing Steps

Run:

rbenv local 3.2.2
bundle exec rspec

And ensure that you don't get errors related to FakeFS::Pathname like the ones below (that we had before the update):

An error occurred while loading ./deliver/spec/[…]_spec.rb.
Failure/Error: undef =~

NameError:
  undefined method `=~' for class `FakeFS::Pathname'
# ./deliver/spec/loader_spec.rb:2:in `require'
# ./deliver/spec/loader_spec.rb:2:in `<top (required)>'
/Users/me/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/fakefs-1.2.3/lib/fakefs/pathname.rb:16: warning: already initialized constant FakeFS::Pathname::TO_PATH
/Users/me/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/fakefs-1.2.3/lib/fakefs/pathname.rb:16: warning: previous definition of TO_PATH was here
/Users/me/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/fakefs-1.2.3/lib/fakefs/pathname.rb:18: warning: already initialized constant FakeFS::Pathname::SAME_PATHS
/Users/me/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/fakefs-1.2.3/lib/fakefs/pathname.rb:18: warning: previous definition of SAME_PATHS was here
/Users/me/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/fakefs-1.2.3/lib/fakefs/pathname.rb:114: warning: already initialized constant FakeFS::Pathname::SEPARATOR_LIST
/Users/me/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/fakefs-1.2.3/lib/fakefs/pathname.rb:114: warning: previous definition of SEPARATOR_LIST was here
/Users/me/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/fakefs-1.2.3/lib/fakefs/pathname.rb:115: warning: already initialized constant FakeFS::Pathname::SEPARATOR_PAT
/Users/me/.rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/fakefs-1.2.3/lib/fakefs/pathname.rb:115: warning: previous definition of SEPARATOR_PAT was here

[rogerluan]

(I think @rogerluan already tried a while ago and encountered some hiccups while trying so paused his work on this?)

Correct!

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Thanks for this @AliSoftware ! 🤗