Change Log Parameters from Environment Variable

As per - http://www.liquibase.org/documentation/changelog_parameters.html - it appears that the currently supported resolutions for change log parameters include:

• Passed as a parameter to your Liquibase runner (see Ant, command_line, etc. documentation for how to pass them)

• As a JVM system property

• In the parameters block (<property> Tag) of the DatabaseChangeLog file itself.

It'd be great to see change log parameters be resolveable from environment variables as well. i.e. look for environment variables with a given key for ${keyName}. This is similar to how https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html#boot-features-external-config deals with these different configuration sources hierarchically.