support group migrations

[vinurs]

in resources/migrations directories, i want to group the sql files by sub-directory, then when i run

java -Dconf=prod-config.edn -jar suoyan-admin.jar migrate

it shows the error:

2019-10-23 10:07:02,211 [main] WARN migratus.migrations - skipping: 'user/20190222174644-create-oauth-refresh-token-table.up.sql' migrations must match pattern: ^(\d+)-([^.]+)((?:.[^.]+)+)$

[yogthos]

That sounds reasonable to me. I might not have time in the near future, but I'm open to a PR if you get a chance before I do.

[vinurs]

i have send a PR for this