Update dependency alembic to v1.12.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
alembic (source, changelog)	1.11.3 -> 1.12.0

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Configuration

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[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (3db3331) 66.92% compared to head (99270ad) 66.92%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #518   +/-   ##
=======================================
  Coverage   66.92%   66.92%           
=======================================
  Files          46       46           
  Lines        2948     2948           
  Branches      703      703           
=======================================
  Hits         1973     1973           
  Misses        949      949           
  Partials       26       26           

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