synopsis: Add NoContentVerb
prs: #1228 #1219
issues: #1028
significance: significant

description: {

The `NoContent` API endpoints should now use `NoContentVerb` combinator.
The API type changes are usually of the kind 

```diff
- :<|> PostNoContent '[JSON] NoContent
+ :<|> PostNoContent 
```

i.e. one doesn't need to specify the content-type anymore. There is no content.

}