GitHubAPI fails when the API responds with a 204 No Content

[gcotelli]

I'm using the API to remove labels in my projects, and it fails because delete: expects a JSON content as response, and it's not always the case. For labels, for example, the API will return a 204 No Content when it's successful.

[gcotelli]

You can try it in a new testing repo using:

| repo owner api labels |
repo := 'REPO'.
owner := 'OWNER'.
api := IceGitHubAPI new 
	credentials: (IcePlaintextCredentials new username: 'USER';password: 'PASSWORD';yourself).
labels := api get: ('repos/<1s>/<2s>/labels' expandMacrosWith: owner with: repo).
labels collect: [ :label | api delete: ('/repos/<1s>/<2s>/labels/<3s>' expandMacrosWith: owner with: repo with: (label at: #name) urlEncoded)  ].