Add meta/requirements.yml; support ansible-core 2.11

The selinux role requires ansible.posix.{selinux,seboolean} and
community.general.{seport,sefcontext,selogin}. Add requirements
for the ansible.posix and community.general collections.

Updated .ansible-lint to support meta/requirements.yml.

Add meta/requirements.yml; support ansible-core 2.11 (#94)

• Add meta/requirements.yml; support ansible-core 2.11

Add an instruction to install requirements to README.md.

• Add Requirements section header

Add Requirements section header

fix ansible-lint issues (#95)

make sure all tasks are named
use reboot module instead of command

support python 39, ansible-core 2.12, ansible-plugin-scan (#96)

update tox-lsr version to 2.7.1 (#97)

update the tox-lsr version used in github actions tox CI
to 2.7.1

The only difference between this an 2.7.0 is that Ansible 2.12
is now GA.