--regex-pattern option ignored by CLI

[peter-bloomfield]

The command line interface seems to ignore the --regex-pattern option. For example:

slugify --regex-pattern "[^-a-z0-9_]+" "___This is a test___"

Based on the unit tests (see test_regex_pattern_keep_underscore), the expected result should be "___this-is-a-test___". However, it's actually "this-is-a-test".

[jdevera]

@peter-bloomfield great find! Seems like there is a missing wiring of that option in the CLI.