fix: skip empty manifest during (pre)import

See merge request !952

feat: implement import DELETE endpoint

See merge request !935

fix: do not report import error if target repository does not exist

See merge request !954

fix: gracefully handle missing tags prefix during pre-imports

See merge request !955

Add trivy-db media types

See merge request !957

# [3.37.0](v3.36.1-gitlab...v3.37.0-gitlab) (2022-03-30)

### Bug Fixes

* do not report import error if target repository does not exist ([2775446b](2775446b))
* gracefully handle missing tags prefix during pre-imports ([a49aa80b](a49aa80b))
* skip empty manifest during (pre)import ([97effe0e](97effe0e))

### Features

* implement import DELETE endpoint ([6edc99b3](6edc99b3))