Merge pull request #803 from vigneshshettyin/dependabot/pip/alembic-1.9.0

Bump alembic from 1.7.3 to 1.9.0

Author: vigneshshettyin

requirements.txt

@@ -1,4 +1,4 @@
-alembic==1.7.3
+alembic==1.9.0
 aniso8601==9.0.1
 autopep8==2.0.0
 blinker==1.4