Update license_finder to latest version (6.14.2)

Bump license_finder gem to the latest version to get support for the the --enabled-package-managers option.

Related issues

Closes #49 (closed)
omnibus-gitlab#6180 (closed)

Test plan

• Run omnibus-gitlab pipeline trigger-package with BUILDER_IMAGE_REGISTRY and PUBLIC_BUILDER_IMAGE_REGISTRY set to registry.gitlab.com/gitlab-org/gitlab-omnibus-builder/staging. Set BUILDER_IMAGE_REVISION to 49-update-license-finder-to-latest-version-6-14-2. Check build log to see if the following licenses are added:
  • github.com/hashicorp/consul/api
  • github.com/hashicorp/consul/sdk
  • github.com/circonus-labs/circonus-gometrics
  • github.com/circonus-labs/circonusllhist
  • github.com/gorhill/cronexpr
  • github.com/rcrowley/go-metrics
  • github.com/tj/go-redirects
  • github.com/alicebob/gopher-json
  • github.com/pavelmemory/go-license-detector/v4