version 2.4.1

BUILDS UPDATED 2019-01-26 with go-1.11.5 (with crypto/tls denial-of-service fix)

Fixes:

• #11 fix GitLab provider (related to --gitlab-group flag)

Changes:

• only fetch up to 10 pages of GitLab groups for a user (similar to other providers groups checks)
• refactor FlagSet into a function for testing
• clean up test.sh and dist.sh, add Dockerfile