Update haml requirement from >= 4.0, < 6 to >= 4.0, < 7

[dependabot]

Updates the requirements on haml to permit the latest version.

Release notes

Sourced from haml's releases.

6.0.0

Haml 6 became 1.7x faster than Haml 5, and it's now faster than Slim and Erubi in this benchmark that was originally written by Slim developers.

$ bundle exec ruby benchmark/slim/run-benchmarks.rb
Calculating -------------------------------------
       erubi v1.11.0    34.595k i/100ms
         slim v4.1.0    30.931k i/100ms
  haml v6.0.0.beta.1    35.621k i/100ms
-------------------------------------------------
       erubi v1.11.0    411.827k (± 0.4%) i/s -      2.076M
         slim v4.1.0    361.660k (± 0.4%) i/s -      1.825M
  haml v6.0.0.beta.1    427.207k (± 0.6%) i/s -      2.137M
Comparison:
haml v6.0.0.beta.1:   427206.9 i/s
erubi v1.11.0:   411826.6 i/s - 1.04x slower
slim v4.1.0:   361659.8 i/s - 1.18x slower

Changes

• Replace the implementation with Hamlit
  • The parser is kept as is, but everything else is replaced.
  • All Haml helpers except for preserve are removed.
  • Some legacy Rails integration is removed.

Changelog

Sourced from haml's changelog.

6.0.0

Released on September 21, 2022 (diff).

• Replace the implementation with Hamlit
  • Haml 6 is about 1.7x faster than Haml 5 in this benchmark.
  • The parser is kept as is, but everything else is replaced.
  • The haml CLI interface was also replaced.
  • All Haml helpers except for preserve are removed.
  • Some legacy Rails integration is removed.

5.2.2

Released on July 27, 2021 (diff).

• Support config.action_view.annotate_rendered_view_with_filenames = true of Rails 6.1

5.2.1

Released on November 30, 2020 (diff).

• Add in improved "multiline" support for attributes #1043

5.2

Released on September 28, 2020 (diff).

• Fix crash in the attribute optimizer when #inspect is overridden in TrueClass / FalseClass #972
• Do not HTML-escape templates that are declared to be plaintext #1014 (Thanks @​cesarizu)
• Class names are no longer ordered alphabetically, and now follow a new specification as laid out in REFERENCE #306

5.1.2

Released on August 6, 2019 (diff).

• Fix crash in some environments such as New Relic by unfreezing string literals for ParseNode#inspect. #1016 (thanks Jalyna)

5.1.1

Released on May 25, 2019 (diff).

• Fix NameError bug that happens on ruby 2.6.1-2.6.3 + haml 5.1.0 + rails < 5.1 + erubi. (Akira Matsuda)

5.1.0

... (truncated)

Commits

• 3a6f147 Version 6.0.0
• 1bed4fc Version 6.0.0.beta.2
• 16e6f9a Throw exceptions from Haml::Parser like Haml 5
• 23554f7 Unify Error and HamlError
• 84cc3ed Mention the haml CLI change as well
• 1be9800 Remove bundle install dependency from rake release
• 1e33193 Version 6.0.0.beta.1
• ebb459d Polish benchmarks and remove escape_utils dependency
• 6f742e9 Resurrect block capturing support (#1081)
• c9d0023 Merge pull request #1077 from petergoldstein/feature/add_ruby_3_1_to_ci
• Additional commits viewable in compare view

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