Add term_customizer gem

[HHassig]

Added the term_customizer gem.
Set other gems to branch release/0.27-stable.
Needed to hard-code decidim-core, "0.27.5"

[davidbeig]

In the test workflow we can see the following error

warning: parser/current is loading parser/ruby30, which recognizes 3.0.7-compliant syntax, but you are running 3.0.6.

It says that the parser gem recognizes the ruby 3.0.7 syntax but we are running v3.0.6. Following the updates in that gem i found this change. whitequark/parser@31faa0a It looks like that change is the one responsible for this error.

Since parser is not a gem we are using, but one of our dependencies we have to check which one is it.

It's used by

• rubocop v1.28.2 - parser v3.1.0.0
• better_html v1.0.16 - parser >= v2.4
• erb_lint v0.0.37 - parser >= v2.7.1.4
• i18n-tasks v0.9.37 - parser >= v2.2.3.0
• rubocop-ast v1.32.3 - parser >= v.3.3.1.0 <--- this one seems to be the responsible

The version installed is: v3.3.5.0, so it has the change i pointed before.

The last version of rubocop-ast to have a dependency on a correct version of parser is v.1.31.2. You can see it here

I think that by adding it to the test group in the Gemfile it will work fine.

Good job with the update of the test workflow :)