[Select2] Update Bootstrap theme?

[florianlacreuse]

4 years ago, Select2 Bootstrap theme was added to wicketstuff-select2 but it it hasn't been updated since.

I could do a PR if needed but I was wondering if either:

• We should stick it with Bootstrap 3 and in this case we will use the 0.1.0-beta.10 release from select2/select2-bootstrap-theme. The lastest release was 2 years ago, the project seems rather dead.
• We should upgrade to Bootstrap 4. In our projects, we use this fork for BS4. This fork was made for this pending PR (select2/select2-bootstrap-theme).

Also, we could update the select2-examples project to use BS3 or BS4 instead of BS2, and may be some examples with the Bootstrap theme?

[solomax]

I do prefer latest versions :)
Unfortunately I have no enough free time to dig into topic :(
Feel free to create PR, so we can discuss it :)

[florianlacreuse]

Thanks for the first feedback! PR done: #673.

[florianlacreuse]

PR is merged but we still need to figure out what to do with having a select2 bootstrap theme inside wicketstuff-select2. Drop it? Only support BS4? Support BS4 and BS3, if so, how?

See my message in the PR thread.

[florianlacreuse]

PR has been merged and it seems it's OK to upgrade to BS4 in master branch. I close this issue.

@solomax Thanks for your help.