chore: updated version from "2.0.0-beta3" to "2.0.0-beta4" #4

Job	Run time
matrix-builder	13s
Skipping on Python 3.11 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	23s
Test on Python 3.7 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	1m 10s
Skipping on Python 3.12 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	21s
Test on Python 3.7 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 12s
Test on Python 3.8 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	1m 13s
Test on Python 3.8 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 46s
Test on Python 3.9 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	1m 48s
Test on Python 3.9 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 20s
Test on Python 3.10 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	1m 5s
Test on Python 3.10 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 10s
Test on Python 3.11 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 9s
Test on Python 3.12 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 11s
Test on Python pypy-3.9 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	1m 49s
Test on Python pypy-3.9 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 47s
Test on Python pypy-3.10 and ubuntu-20.04 with celery>=4.0.0,<5.0.0	1m 42s
Test on Python pypy-3.10 and ubuntu-20.04 with celery>=5.0.0,<6.0.0	1m 31s
	20m 50s

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