Support buffers for OB DataElement Values

* support setting pixel data to a reference to a BufferedReader
* change version to 2.4.3+buffer-support
* See pydicom#1919

Fix codify rel path (pydicom#1867)

* cherry-picked from main branch of 3.0 dev

Update version

Update version number

Publish workflow - fix syntax

Also pin mypy in the merge workflow (pydicom#1729)

Prep 2.3 (pydicom#1620)

* Prep v2.3, dicom to 2022a
* Update release note for 2022a

Merge pull request pydicom#1518 from hackermd/patch-release-2.2.2

Patch release 2.2.2

Merge pull request pydicom#1489 from hackermd/patch-release-2.2.1

Patch release 2.2.1

Update version to 2.2.0