Update dependency org.flywaydb:flyway-core to v9

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.flywaydb:flyway-core (source)	5.2.3 -> 9.22.2

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[codecov]

Codecov Report

Merging #6 (b2b9a1a) into master (b68d9bd) will not change coverage.
Report is 4 commits behind head on master.
The diff coverage is n/a.

❗ Current head b2b9a1a differs from pull request most recent head 399f869. Consider uploading reports for the commit 399f869 to get more accurate results

@@            Coverage Diff            @@
##             master       #6   +/-   ##
=========================================
  Coverage     54.33%   54.33%           
  Complexity       39       39           
=========================================
  Files            13       13           
  Lines           127      127           
  Branches         11       11           
=========================================
  Hits             69       69           
  Misses           52       52           
  Partials          6        6