squeezer cannot be installed with ansible-core 2.21

[mayrstefan]

Ansible Core 2.21 was released recently.
pulp.squeezer cannot be installed through ansible-galxy with that version because of

squeezer/meta/runtime.yml

Line 46 in 5f198e9

requires_ansible: '>=2.16.0,<2.21'

This has an unexpected side effect when using the ansible-lint Github action:

• the GHA for ansible-lint always uses the latest ansible-core
• pulp.squeezer:0.0.15 was the last version with no upper limit for the ansible version, just >= 2.8
• if no version for pulp-squeezer is specified in the requirements file version 0.0.15 is selected

So for squeezer the compatibility with ansible-core 2.21 should be checked und the version requirement should be modified if possible

[mayrstefan]

Works with pulp.squeezer:0.4.0
Fix seemed to be #247

Thank you