Release gitlab-experiment version 0.7.0

Updating gitlab-experiment to version 0.7.0.

• Complete 0.7.0 diff: gitlab-org/ruby/gems/gitlab-experiment@v0.6.5...release-0.7.0

• Release merge request: gitlab-org/ruby/gems/gitlab-experiment!153 (merged)

• Checklist before merging:

  • Diff link is up-to-date and working.
  • Release notes are accurate.
  • Gitlab project has been updated and CI is passing.

This MR is generated by an automated release process. If you'd like to add additional information to the MR description, please do, but keep your changes to the area above the changelog, as that can be replaced by the automation process.

We've opened an issue to address the deprecation warnings in a few phases.

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0.7.0 Changelog

Added

• Add an improved "run" callback interface with before_run, after_run and around_run
• Add a configuration for strict experiment registration (disallow anonymous experiments without being backed by a class definition)
• Add class level interface for defining the experiment behaviors
• Add initial capability for rollout strategies to assign control
• Add register_behavior rspec matcher

Fixed

• Fixed compatibility for ruby 2.6.x
• Fixed issues with stubbing and the track rspec matcher

Changed

• Allow publish to be called without a result argument

Deprecated

• The use of use { } and try { } has been deprecated, instead use control { }, candidate { } and variant(:named_variant) { }
• Passing a named variant argument to candidate { } (or try { }) has been deprecated, instead use variant(:named_variant) { }
• Calling variant (as in variant.name to get, or variant(:assigned_variant) to set) has been deprecated, instead use assigned (as in assigned.name to get the variant that has been assigned, and assigned(:assigned_variant) to manually set one)
• Using public *_behavior methods has been deprecated, instead declare the experiment in the class using control, candidate and variant(:variant_name) registration methods
• Configuration of context_hash_strategy has been deprecated, instead use context_key_secret and context_key_bit_length configuration options
• Configuration variant_resolver, and inclusion_resolver options have been deprecated, instead put this logic into custom rollout strategies
• The experiment_group? method has been deprecated, which may have been overridden in subclasses, instead put this logic into custom rollout strategies
• The flipper_id and session_id methods have been deprecated, which may have been overridden in subclasses, instead put this logic into custom rollout strategies

Removed

• Removed scientist as a gem dependency

Other

• Project has been moved to https://gitlab.com/gitlab-org/ruby/gems/gitlab-experiment