Release v1.3.0 - Githubissues

Changes

Added support for the TZ environment variable (setting timezones ex. "Europe/Stockholm") through the tzdata package. (#20)
Changed to return IETF RFC-7807 compatible problem responses on failures instead of solely JSON-formatted strings. (#15)
Added Makefile to simplify building and developing the project locally. (#21, #22, #23)
Removed logging via github.com/sirupsen/logrus and the dependency on the package as well. (#23)
Added logging via github.com/iver-wharf/wharf-core/pkg/logger. (#23)
Added dependency on github.com/iver-wharf/wharf-core v1.1.0. (#23)
Added documentation to the remaining exported types. (#24)
Changed version of github.com/iver-wharf/wharf-api-client-go from v1.2.0 -> v1.3.1. (#26)
Changed version of github.com/iver-wharf/wharf-core from v1.1.0 -> v1.3.0. (#25, #38)
Removed internal/httputils, which was moved to github.com/iver-wharf/wharf-core/pkg/cacertutil. (#25)
Changed version of Docker base images, relying on "latest" patch version:
- Alpine: 3.14.0 -> 3.14 (#28)
- Golang: 1.16.5 -> 1.16 (#28)
Changed Dockerfile for easier windows building. (#39)
Fixed projects failing to import when a different GitLab repository began with the same name (#3), eg. myGroup/myRepo and myGroup/myRepo2. (#40)