Add support for GitHub bot users

[JosephDuffy]

I have added Dependabot to one of my projects, and Danger Swift is failing because the PR was created by a bot user: JosephDuffy/Partial#14, https://travis-ci.com/JosephDuffy/Partial/jobs/211151759.

I used the GitHub API to request the data for the above PR and then used the value of theuser key to create a test for decoding this type of user.

It looks like the documentation should be updated to reflect the new UserType case. I have run make docs, but it only updates half of the docs, eventually failing in ./Scripts/update_docs.rb with:

The operation couldn’t be completed. (SourceKittenFramework.Request.Error error 2.)
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/json/common.rb:156:in `initialize': A JSON text must at least contain two octets! (JSON::ParserError)
	from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/json/common.rb:156:in `new'
	from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/json/common.rb:156:in `parse'
	from ./Scripts/update_docs.rb:27:in `<main>'

It would appear that SourceKitten is throwing an error, but I am unable to figure out how to debug/fix this! :(

[f-meloni]

Amazing!
Thank you very much!
Just a small comment :)

[f-meloni]

Can you please format this JSON

[JosephDuffy]

I have indented it and started the commit (it is running pre-commit hook tests etc.). Hopefully it will be the desired format :) If not let me know!

[f-meloni]

Documentation is automatically updated by Rocket on release, then is fine we can merge this, and figure out the doc problem later :)

[DangerCI]

	Warnings
⚠️	Sources/Danger/GitHubDSL.swift#L154 - Enum element name should be between 3 and 40 characters long: 'id' (identifier_name)
⚠️	Sources/Danger/GitHubDSL.swift#L170 - Variable name should be between 3 and 40 characters long: 'id' (identifier_name)
⚠️	Sources/Danger/GitHubDSL.swift#L184 - Variable name should be between 3 and 40 characters long: 'id' (identifier_name)
⚠️	Sources/Danger/GitHubDSL.swift#L227 - Enum element name should be between 3 and 40 characters long: 'id' (identifier_name)
⚠️	Sources/Danger/GitHubDSL.swift#L240 - Variable name should be between 3 and 40 characters long: 'id' (identifier_name)
⚠️	Sources/Danger/GitHubDSL.swift#L271 - Enum element name should be between 3 and 40 characters long: 'id' (identifier_name)
⚠️	Sources/Danger/GitHubDSL.swift#L291 - Variable name should be between 3 and 40 characters long: 'id' (identifier_name)
⚠️	Sources/Danger/GitHubDSL.swift#L331 - Enum element name should be between 3 and 40 characters long: 'id' (identifier_name)
⚠️	Sources/Danger/GitHubDSL.swift#L359 - Variable name should be between 3 and 40 characters long: 'id' (identifier_name)
⚠️	Sources/Danger/GitHubDSL.swift#L410 - Variable name should be between 3 and 40 characters long: 'id' (identifier_name)
⚠️	Sources/Danger/GitHubDSL.swift#L434 - Enum element name should be between 3 and 40 characters long: 'id' (identifier_name)
⚠️	Sources/Danger/GitHubDSL.swift#L453 - Variable name should be between 3 and 40 characters long: 'id' (identifier_name)
⚠️	Sources/Danger/GitHubDSL.swift#L487 - File should contain 400 lines or less: currently contains 487 (file_length)

Generated by 🚫 Danger Swift against 70a2818

[JosephDuffy]

Documentation is automatically updated by Rocket on release, then is fine we can merge this and figure it out the doc problem later :)

Ah brilliant, thanks! :)

[f-meloni]

Nice!
Merge on green