Tests

Chore: Bump version to 1.2.3 #129

Job	Run time
Build BlazingMQ as a dependency	25m 24s
Coverage	1m 33s
Test on Linux (3.11)	1m 59s
Test on Linux (3.13)	2m 9s
Test on Linux (3.12)	2m 9s
Lint and Docs	1m 12s
Test on Linux (3.10)	2m 14s
Test on Linux (3.9)	2m 8s
	38m 48s

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