Backport "Fix decidim-templates gem definition to include templates migrations" to v0.23

[microstudi]

🎩 What? Why?

Backport #6899 to 0.23.

Requires to upload a new gem version to rubygems.org. Should I bump the version in this PR to 0.23.2 @tramuntanal ?

📌 Related Issues

Link your PR to an issue

• Related to Fix decidim-templates gem definition to include templates migrations #6899
• Fixes Cannot run decidim_templates:install:migrations #6897

Testing

Describe the best way to test or validate your PR.

📋 Checklist

🚨 Please review the guidelines for contributing to this repository.

• ❓ CONSIDER adding a unit test if your PR resolves an issue.
• ✔️ DO check open PR's to avoid duplicates.
• ✔️ DO keep pull requests small so they can be easily reviewed.
• ✔️ DO build locally before pushing.
• ✔️ DO make sure tests pass.
• ✔️ DO make sure any new changes are documented in docs/.
• ✔️ DO add and modify seeds if necessary.
• ✔️ DO add CHANGELOG upgrade notes if required.
• ✔️ DO add to GraphQL API if there are new public fields.
• ✔️ DO add link to MetaDecidim if it's a new feature.
• ❌AVOID breaking the continuous integration build.
• ❌AVOID making significant changes to the overall architecture.

📷 Screenshots

Please add screenshots of the changes you're proposing

♥️ Thank you!

[tramuntanal]

@microstudi erb linter crashes due to

NameError: uninitialized constant BetterHtml::Parser::HtmlError
Did you mean?  HtmlTokenizer

[microstudi]

@microstudi erb linter crashes due to

NameError: uninitialized constant BetterHtml::Parser::HtmlError
Did you mean?  HtmlTokenizer

This happenning in all 0.23 backports, it seems that erblin 0.0.30 is broken.

[tramuntanal]

The erb-lint problem has been solved here: Shopify/erb-lint#167, upgrading to v0.0.35 should solve the issue

[tramuntanal]

erb-lint should be >= v0.0.33 @microstudi

[microstudi]

@tramuntanal I've tried to upgrade erb-lint but it is a mess, it forces you to upgrade rubocop, which in turn has lots of new changes, which forces to modify a bunch of existing files in the code...
I don't know if it's worthy, and I don't think it's in the scope of this PR. Shouldn't be a maintenance PR to do that ?

[tramuntanal]

Merging as the erb-linter error is not related with this PR and it doesn't change any erb file