Update filewatcher requirement from ~> 2.1 to >= 2.1, < 4.0

[dependabot]

Updates the requirements on filewatcher to permit the latest version.

Release notes

Sourced from filewatcher's releases.

New Ruby versions

• Drop Ruby 2.6, 2.7, 3.0 and 3.1 support.
• Add Ruby 3.2, 3.3, 3.4 and 4.0 support.
• Add logger dependency. It's not bundled anymore.
• Move development dependencies from gemspec into Gemfile.
• Update development dependencies.
• Resolve new RuboCop offenses.
• Improve CI.

Changelog

Sourced from filewatcher's changelog.

3.0.0 (2026-02-03)

• Drop Ruby 2.6, 2.7, 3.0 and 3.1 support.
• Add Ruby 3.2, 3.3, 3.4 and 4.0 support.
• Add logger dependency. It's not bundled anymore.
• Move development dependencies from gemspec into Gemfile.
• Update development dependencies.
• Resolve new RuboCop offenses.
• Improve CI.

2.1.0 (2022-11-17)

• Improve documentation about existing plugins.
• Change specs to a new multi-pattern system.
• Update development dependencies.
• Upgrade Codecov uploader for tests coverage.
• Enable RSpec --only-fail feature.
• Resolve new RuboCop offenses.
• Improve Cirrus CI config.

2.0.0 (2022-09-09)

• Add plugin system. Take out CLI and spinner. Add more plugins like matrix and access.
• Remove :every option: do it yourself via changes.first, if you want.
• Drop Ruby 2.4 and 2.5 support.
• Support Ruby 3.0 and 3.1.
• Switch from bacon test framework to RSpec. Speed up and improve tests, fix many phantom fails.
• Update development dependencies.
• Add rubocop-rspec and rubocop-performance.
• Resolve new offenses from RuboCop and its plugins.
• Switch from Travis CI to Cirrus CI.
• Add JRuby, Windows and TruffleRuby to CI.
• Add bundle-audit CI task.

1.1.1 (2018-09-11)

• Fix --restart option.

1.1.0 (2018-09-10)

• Replace Trollop with Optimist.

1.0.0 (2017-09-24)

... (truncated)

Commits

• b079f65 Update version to 3.0.0
• 1df409c Update year in README copyright
• c2fef1e Update RuboCop dependencies
• 9d24acb Try to remove RUBY_PATH from macOS CI env vars
• f39f787 Try to simplify fingerprint script for Ruby cache in macOS CI
• b494d9f Change cache folder for Ruby in macOS CI
• 775915f Update macOS CI image
• 9719b3a Try to fix Ruby cache for macOS CI
• 11c390a Reuse folder name for Ruby cache in Windows CI instead of env var
• 2131428 Try to fix Ruby cache for Windows CI
• Additional commits viewable in compare view

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