0.50.0

Now requests are done by separated functions (#282).
Although the same API is generated by default, this is a major change, and as such, the version was bumped to a higher number (still in 0.x, though, from 0.25.x to 0.5.x).
It is possible to no longer generate services, and use only specific functions in code.
This helps reduce the bundle size of applications with a large API.
See https://github.com/cyclosproject/ng-openapi-gen#using-functional-api-calls

Some templates have significantly changed. So, if you have custom templates, please, rebase them to the latest ones.

Also, json-schema-ref-parser was downgraded due to (#267).