chore: Upgrade Python requirements #95

Job	Run time
run_ci (ubuntu-20.04, 3.8, discovery+lms+forum)	18m 27s
run_ci (ubuntu-20.04, 3.8, discovery+lms+forum)	18m 27s
run_ci (ubuntu-20.04, 3.8, registrar+lms)	16m 2s
run_ci (ubuntu-20.04, 3.8, registrar+lms)	16m 2s
run_ci (ubuntu-20.04, 3.8, ecommerce+lms)	15m 45s
run_ci (ubuntu-20.04, 3.8, ecommerce+lms)	21m 48s
run_ci (ubuntu-20.04, 3.8, edx_notes_api+lms)	15m 15s
run_ci (ubuntu-20.04, 3.8, edx_notes_api+lms)	15m 15s
run_ci (ubuntu-20.04, 3.8, credentials+lms)	15m 36s
run_ci (ubuntu-20.04, 3.8, credentials+lms)	15m 36s
run_ci (ubuntu-20.04, 3.8, xqueue)	2m 44s
run_ci (ubuntu-20.04, 3.8, xqueue)	2m 44s
run_ci (ubuntu-20.04, 3.8, analyticsapi+insights+lms)	19m 6s
run_ci (ubuntu-20.04, 3.8, analyticsapi+insights+lms)	19m 6s
	3h 31m 53s

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