Bump pub_semver from 2.1.5 to 2.2.0 in /scripts

[dependabot]

Bumps pub_semver from 2.1.5 to 2.2.0.

Release notes

Sourced from pub_semver's releases.

package:pub_semver v2.2.0

• Remove dependency on package:meta.
• Mark Version class as final instead of with @sealed.
• Clarify that the lists returned by the preRelease and build properties of Version and the ranges property of VersionUnion should not be modified.
• Note that VersionConstraint.any and VersionConstraint.empty static fields shouldn't be reassigned and will be made final in a future release.

Commits

• d67cd00 [pub_semver] Remove dependency on package:meta (#2021)
• 04667d7 [pub_semver] Discourage modification of properties intended to be unmodifiabl...
• 9765c2a [package_config] Implement relational operators for LanguageVersion (#2016)
• b51f39d [package_config] Fix incorrect error message when validating parameters in `L...
• 1e94649 coverage: Allow specifying coverage flags via a yaml file (#1954)
• 933f5ea [unified_analytics] Send enabled_features as an event parameter rather than...
• ab25b55 skipping failing test (#2008)
• 8b73e68 add issue_tracker links to pubspec files (#1975)
• cc43df8 Update pubspec.yaml
• 5db5ae6 update glob infra and readme post merge
• Additional commits viewable in compare view

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[copybara-service]

https://dart-review.googlesource.com/c/dart-docker/+/419580 has been updated with the latest commits from this pull request.

[copybara-service]

https://dart-review.googlesource.com/c/dart-docker/+/419580 has been updated with the latest commits from this pull request.

[copybara-service]

https://dart-review.googlesource.com/c/dart-docker/+/419580 has been updated with the latest commits from this pull request.

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