fixes #46

Turns out these actually fail.

Fixes #48

- github.com/swaggo/swag/gen@v1.8.7
- github.com/swaggo/swag/cmd/swag@v1.8.7

This reverts commit 3bad2f27.

CI: api.json path in global var

See merge request !10

chore(make): go path init, add init.dev target

See merge request !9

Following is changed:
  - Initialize GOPATH for easier execution of the `api-docs` target
  - Add `init.dev` target for installing dev dependencies.

Fix schemathesis tests

See merge request !8