Remove older releases and make Squid default

Release 1.20.0

Bump to 1.19.3

Merge pull request #178 from stackhpc/bump-collection

Bump the collection to 1.19.2

Merge pull request #174 from stackhpc/bump-version

Bump version to 1.19.1

Bump to 1.19.0

Merge pull request #156 from stackhpc/add-ceph-squid

feat: add `Squid` ceph release

Merge pull request #153 from stackhpc/maintenance

Add enter_maintenance and exit_maintenance roles

Release 1.17.0

Merge pull request #145 from stackhpc/fix/cephadm-keys

 Make cephadm_key module stateless