Ploy-ansible

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* Dropped support for Python 3.6.
[fschulze]

* Added support for Python 3.10 using ansible-core.
[fschulze]

* Restore ploy_crypted compatibility for older Ansible versions.
[fschulze]

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* Never store python objects in inventory data to fix issues with
ansible >= 2.8.x.
[fschulze]

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* Fix encoding issue with execnet connection on Python 3.x.
[fschulze]

* Fix hanging when using keyring in newer macOS with ansible 2.x.
[fschulze]

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* Support switch from vault ``cat`` to ``view`` command for ansible 2.x.
[fschulze]

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* This release works up to and including ansible 2.7.x.
[fschulze]

* Restored support for ansible 1.9.x.
[fschulze]

* Support Python >= 3.5 with ansible >= 2.4.x.
[fschulze]

* Make host lookup in InventoryManager lazy to prevent errors when unrelated
hosts are not accessible.
[fschulze]

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* Fix become/sudo support for ``execnet_connection``.
[fschulze]

* Fix playbook discovery.
[fschulze]