Replace use of deprecated Liquibase#update(Contexts) method in H2LiquibaseExtension

[sleberknight]

Liquibase has deprecated a bunch of the update methods (as well as many rollback methods). We need to find a replacement.

Note that this indirectly affects PostgresLiquibaseTestExtension, because it uses the PreparedDbExtension from the Zonky embedded-postgres library, which uses the same deprecated Liquibase#update method in the LiquibasePreparer class.

I tried using a few of the non-deprecated update methods and they didn't work, because it seems they did not actually perform the database update! e.g. I tried update(Contexts contexts, Writer output) and update(Contexts contexts, LabelExpression labelExpression, Writer output). The documentation is non-existent on the Liquibase#update methods that are not deprecated, i.e. they have no javadocs. And, the deprecated methods don't tell you anything about what the replacement is, so this is going to take some work.

[sleberknight]

A few references I found (none of which are currently sufficient to make this easy...):

• 4.21.1 is out, deprecates Liquibase.update()
• liquibase.command.CommandScope
• Calling Commands
• class CommandScope
• liquibase-core update method does not create databasechangeloglock table (see in particular this answer)