Draft release notes for sourmash v3.4.0

[ctb]

git log --oneline v3.3.1..master shows:

Major new features:

• enable seamless loading of signatures from indexed databases (#1059, #1083, #1090)
• add signature cat and signature split commands to combine/split signature files (#1044, #1074)
• add compute-optimized MinHash (for small scaled or large cardinalities) in Rust (#1045)
• optionally weight lca summarize output by hashval abundance. (#1022)
• enable moltypes other than DNA in LCA databases (#1013)

Minor improvements:

• add --num-results/-n to gather (#1047)
• improve lca index error message when inserting num signature (#1076)
• autodetect FASTA/FASTQ files if given as signatures (#1078)
• add is_lineage_match, pop_to_rank, make_lineage to lca_utils (#1081)
• use stricter niffler versions and add new gz feature to it (#1070)
• added MinHash.clear() and MinHash.add_hash_with_abundance to Python API (#1046)

Bugs fixed:

• investigations and fixes around new gather behavior. (#1001)

Refactoring:

• move tests from test_lca into test_lca_functions (#1035)
• remove unused run_shell_cmd function (#1032)
• refactor some tests in test_sourmash.py to use @utils.in_tempdir decorators (#1020)
• use install scripts from py-ipfs-http-client (#1068)

Documentation:

• Improve documentation around abundance projection (#1073)
• Replace recommonmark with myst (docs) (#1021)
• Fix doctest filename error (#1040)

Thanks to @luizirber @ctb @bluegenes @erikyoung85 for their contributions!

[ctb]

notes from during release process:

• my rust version needed to be updated to do a build, with rustup update

[ctb]

released! https://github.com/dib-lab/sourmash/releases/tag/v3.4.0