dib-lab/sourmash: v4.1.2

This is a bug-fix and performance release of sourmash. There are no major new features. Minor new features: add query info to gather CSV output (#1565) Bug fixes and performance improvements: Improved MinHash.remove_many(...) performance by five orders of magnitude (#1571) Fix SBT index saving bug that arbitrarily replaced names (but not content) of identical signatures in .sbt.zip files (#1568) Empty zipfiles should not cause AssertionError (https://github.com/dib-lab/sourmash/pull/1546) Major refactoring and new internal functionality: update MinHash.set_abundances to remove hash if 0 abund; handle negative abundances (#1575) Refactoring and cleanup: Fix tests that fail to close files that they open (#1550) Add "&" and " | " as alternate syntax for MinHash intersection merge (#1533) Fix missing bracket in docs (#1566) Updates for coverage tracking (#1558) Provide a .copy() method for both SourmashSignature() and MinHash (#1551, #1570