Update Javascript dependencies

[Gusted]

Description

Resolves: #2165

As in issue #2165 the current version of Bootstrap still relies on jQuery, since v5 bootstrap only relies on the already existence popper.js(@popper/core) dependency.
Thereby updating those 2 dependencies fixes this issue and still maintain all features.
Eventually the non beta of Bootstrap v5 can be used when it's stable.

Summary of what this PR means:

• Update bootstrap to v5.0.0-beta1.
• Update popper.js to v2.6.0.
• Update Javascript license of popper.js.
• Bump version in scripts.html.

Check List

• I understand that by not opening an issue about a software/service/similar addition/removal, this pull request will be closed without merging.

• I have read and understand the contributing guidelines.

• The project is Free Libre and/or Open Source Software

• Netlify preview for the mainly edited page: https://deploy-preview-2166--privacytools-io.netlify.app/

[dngray]

Thanks a lot for this, I'll check it out soon!

[dngray]

Looks good.

Only errors i was seeing was:

/usr/lib/ruby/gems/2.7.0/gems/jekyll-3.8.5/lib/jekyll/convertible.rb:41: warning: Using the last argument as keyword parameters is deprecated
/usr/lib/ruby/gems/2.7.0/gems/jekyll-3.8.5/lib/jekyll/tags/include.rb:194: warning: Using the last argument as keyword parameters is deprecated
/usr/lib/ruby/gems/2.7.0/gems/pathutil-0.16.2/lib/pathutil.rb:502: warning: Using the last argument as keyword parameters is deprecated
/usr/lib/ruby/gems/2.7.0/gems/rb-inotify-0.10.0/lib/rb-inotify/watcher.rb:66: warning: rb_safe_level will be removed in Ruby 3.0

I wonder if there's anything we can do about these.

[Gusted]

Looks good.

Only errors i was seeing was:

/usr/lib/ruby/gems/2.7.0/gems/jekyll-3.8.5/lib/jekyll/convertible.rb:41: warning: Using the last argument as keyword parameters is deprecated
/usr/lib/ruby/gems/2.7.0/gems/jekyll-3.8.5/lib/jekyll/tags/include.rb:194: warning: Using the last argument as keyword parameters is deprecated
/usr/lib/ruby/gems/2.7.0/gems/pathutil-0.16.2/lib/pathutil.rb:502: warning: Using the last argument as keyword parameters is deprecated
/usr/lib/ruby/gems/2.7.0/gems/rb-inotify-0.10.0/lib/rb-inotify/watcher.rb:66: warning: rb_safe_level will be removed in Ruby 3.0

I wonder if there's anything we can do about these.

Those are ruby dependencies. A small sudo bundle update should update most dependencies to 2.7+ ruby language. The only warning after updating is

/var/lib/gems/2.7.0/gems/pathutil-0.16.2/lib/pathutil.rb:502: warning: Using the last argument as keyword parameters is deprecated

Which seems to me that some dependency is still using an old version of pathutil, but that's an issue for another pr/issue.

[Gusted]

Which seems to me that some dependency is still using an old version of pathutil, but that's an issue for another pr/issue.

https://github.com/envygeeks/pathutil the last update was from 2018 and is 0.16.2 which is currently specified in gemfile.lock. pathutil is utilized by jekyll.

Their is an open issue about it envygeeks/pathutil#4 and an open PR envygeeks/pathutil#5, however their seems to be no progress.