Features
- Added support for third-party storage backends (i.e., S3, Azure).
[172](https://github.com/pulp/pulp_ostree/issues/172)
- Added support for static deltas. The static deltas are automatically computed for synced and
imported repositories. This behaviour is enabled by default. Set `compute_delta` to `False`
in a corresponding repository if there is no need to compute the static deltas between the last
two commits.
[230](https://github.com/pulp/pulp_ostree/issues/230)
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