pysam-v0.21.0

Release 0.21.0

This release wraps htslib/samtools/bcftools version 1.17.

Pysam is now compatible with Python 3.11. We have removed python 2.x
support. Pysam is tested with python versions 3.6 to 3.11.

• [#1175] VariantHeader.new_record: set start/stop before alleles
• [#1173] Add multiple build improvements in htscodecs on multi-arch macOS
• [#1148] Ignore CIGAR-less reads in find_introns.
• [#1172] Add new samtools cram-size and samtools reset commands
• [#1169] Fix CRAM index-related crash when using the musl C standard library.
• [#1168] Add a minimal pyproject.toml for PEP517.
• [#1158] Fix type hints and add FastqProxy type hints.
• [#1147] Py3.11 compatibility, get shared object suffix from EXT_SUFFIX.
• [#1143] Add mypy symbols for samtools and bcftools.
• [#1155] Fix pysam.index() when using recent samtools index options.
• [#1151] Test suite py3.11 compatibility, work around failing test case.
• [#1149] MacOS universal build compatibility.
• [#1146] Fix build when CFLAGS/etc environment variables are set.

Big thanks to @jmarshall who again has done most of the heavy lifting for this release.