Bump bootsnap from 1.4.4 to 1.4.9

Bumps bootsnap from 1.4.4 to 1.4.9.

Changelog

Sourced from bootsnap's changelog.

1.4.9

• Windows support
• Fix potential crash

1.4.8

• Prevent FallbackScan from polluting exception cause

1.4.7

• Various performance enhancements
• Fix race condition in heavy concurrent load scenarios that would cause bootsnap to raise

1.4.6

• Fix bug that was erroneously considering that files containing . in the names were being required if a different file with the same name was already being required

  Example:

  require 'foo'
  require 'foo.en'

  Before bootsnap was considering foo.en to be the same file as foo

• Use glibc as part of the ruby_platform cache key

1.4.5

• MRI 2.7 support
• Fixed concurrency bugs

Commits

• 0b7482d Merge pull request #323 from Shopify/cut-1.4.9
• cb05a43 Bump version to 1.4.9
• 3fff890 Allow pushing to Rubygems in the gemspec
• c4f0228 Bump version to 1.4.9.rc1
• 652da3f Merge pull request #322 from Shopify/these-are-not-static
• 3ae5900 Don't use rb_str_new_static on heap data
• 057c994 Merge pull request #319 from jpogran/windows-support
• 32394ff (maint) Add Windows setup steps to CONTRIBUTING
• 0cc8fbf Fix tests for windows platform
• 26e4b6f Enable testing using Github Actions
• Additional commits viewable in compare view