chore(deps): bump flyway-core from 6.4.1 to 6.4.4

Created by: dependabot-preview[bot]

Bumps flyway-core from 6.4.1 to 6.4.4.

Release notes

Sourced from flyway-core's releases.

Flyway 6.4.4

Bug fixes. See https://flywaydb.org/documentation/releaseNotes#6.4.4

Flyway 6.4.3

Bug fixes. See https://flywaydb.org/documentation/releaseNotes#6.4.3

Flyway 6.4.2

Bug fixes. See https://flywaydb.org/documentation/releaseNotes#6.4.2

Commits

• c13e688 Merge pull request #2852 from flyway/merge-pull-request-299
• 907fa28 Merge pull request #2851 from flyway/merge-pull-request-303
• fe7786c #2849 Add CockroachDB 20.1 support
• 28cb30f Merge pull request #2850 from flyway/merge-pull-request-302
• 0e47886 Add error message around null schemas
• 823abf4 Fix #2843 Multiple $$ string literals cause Snowflake parser not to identify ...
• 8cfe907 Fix #2837: Unable to specify config property using standard input
• bae5b42 Fix #2843 Multiple $$ string literals cause parser not to identify statements...
• a9402cc Merge pull request #2844 from flyway/merge-pull-request-294
• 3d02239 Fix #2832: Clean modules in DB2
• Additional commits viewable in compare view

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