Fixes #27

Use each repo's org from REPOSITORY list if ORGANIZTION not provided

This makes sense because the repositories in REPOSITORY could have
different organizations

- [x] utilize repo's owner/org  when ORGANIZTION not provided
- [x] show the prefixed org is set when parsing REPOSITORY env var
- [ ] additional testing

Signed-off-by: jmeridth <jmeridth@gmail.com>

`black` linting

Signed-off-by: jmeridth <jmeridth@gmail.com>

when the user provides the org in the org/repo comman
delimited list of REPOSITORY env var, we still need
to validate that the org is an org and not a user

Signed-off-by: jmeridth <jmeridth@gmail.com>

Signed-off-by: jmeridth <jmeridth@gmail.com>

Signed-off-by: jmeridth <jmeridth@gmail.com>

Use keep label to exempt issues as needed

- [x] check if org valid and if REPOSITORY set instead
- [x] update `make lint` to include black
  - [x] add black to requirements-test.txt

Signed-off-by: jmeridth <jmeridth@gmail.com>

Signed-off-by: jmeridth <jmeridth@gmail.com>

…equirement

fix: handle if ORGANIZATION not provided