Djangocms-alias

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* feat: Add more Alias actions to Alias AliasContent Manager versioning actions

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* feat: Close the sideframe when following links to the alias placeholder endpoints

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* feat: Add preview link to Alias AliasContent Manager versioning actions
* feat: Add versioning actions to Alias AliasContent Manager
* feat: Github Actions integration
* Python 3.8, 3.9 support added
* Django 3.0, 3.1 and 3.2 support added
* Python 3.5 and 3.6 support removed
* Django 1.11 support removed