Merge branch '22466-task-list-fork' into 'master'

Resolve "Task List Checkbox Alignment"

## What does this MR do?

Replace the unmaintained `task_list` gem with the `deckar01-task_list` fork

## Are there points in the code the reviewer needs to double check?

 - I had to pin some dependencies in the fork to support `ruby < 2.2`, which added new version restrictions for 2 existing modules.
 - I triggered a build after I removed the patch to show the test passed with the new gem, then I removed the test, because this behavior is tested in the gem's repo now.

## Why was this MR needed?

 - The `task_list` patch was added with a comment that said it should be removed when merged upstream, but the repo got archived, so an upstream patch requires a fork.
 - #22470 can't be patched without warnings due to the way `task_list` uses Ruby constants.
 - There are additional outstanding `task_list` bugs that can be fixed once we switch to a fork.

## What are the relevant issue numbers?

 - #22466 
 - #22470
 - !6487

See merge request !6625

1 files changed, 0 insertions, 16 deletions

diff --git a/spec/lib/banzai/filter/task_list_filter_spec.rb b/spec/lib/banzai/filter/task_list_filter_spec.rb
deleted file mode 100644
index 569cbc885c7..00000000000
--- a/spec/lib/banzai/filter/task_list_filter_spec.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-require 'spec_helper'
-
-describe Banzai::Filter::TaskListFilter, lib: true do
-  include FilterSpecHelper
-
-  it 'does not apply `task-list` class to non-task lists' do
-    exp = act = %(<ul><li>Item</li></ul>)
-    expect(filter(act).to_html).to eq exp
-  end
-
-  it 'applies `task-list` to single-item task lists' do
-    act = filter('<ul><li>[ ] Task 1</li></ul>')
-
-    expect(act.to_html).to start_with '<ul class="task-list">'
-  end
-end