Bump version to 2.1.2 #136

Job	Run time
Lint	1m 24s
Test installation of all dependencies	1m 36s
Test dev setup on ubuntu-latest	53s
Test dev setup on windows-latest	3m 24s
Test dev setup on macos-latest	1m 14s
Test (Python: 3.8, DB: mysql)	23m 59s
Test (Python: 3.8, DB: postgres)	23m 33s
Test (Python: 3.12, DB: mysql)	29m 19s
Test (Python: 3.12, DB: postgres)	33m 32s
Indicate completion to coveralls	17s
Build python wheel	1m 17s
required-checks-pass	2s
	2h 0m 30s

Provide feedback