contributions, github: add missing requires

This resolves `unitialized constant` errors in `brew contributions`
(`Tap`, `GitHub`) and `Utils::GitHub` (`Utils::Curl`).

This also preemptively adds some requires to `Utils::GitHub` and
`GitHub::API`, to avoid similar errors.

Library/Homebrew/dev-cmd/contributions.rb

@@ -6,6 +6,8 @@ require "warnings"
 Warnings.ignore :default_gems do
   require "csv"
 end
+require "tap"
+require "utils/github"
 
 module Homebrew
   module DevCmd

Library/Homebrew/utils/github.rb

@@ -2,6 +2,8 @@
 # frozen_string_literal: true
 
 require "uri"
+require "utils/curl"
+require "utils/popen"
 require "utils/github/actions"
 require "utils/github/api"
 

Library/Homebrew/utils/github/api.rb

@@ -3,6 +3,7 @@
 
 require "system_command"
 require "tempfile"
+require "utils/curl"
 require "utils/shell"
 require "utils/formatter"
 require "utils/uid"