revert gem name from OmniAuth to Omniauth

Author: ebenz99

example/example.rb

@@ -10,7 +10,7 @@
 secret = ENV['AZURE_APPLICATION_CLIENT_SECRET']
 
 use Rack::Session::Cookie
-use OmniAuth::Builder do
+use Omniauth::Builder do
   provider :microsoft_graph, client_id, secret
 end
 

lib/omniauth/microsoft_graph/version.rb

@@ -1,4 +1,4 @@
-module OmniAuth
+module Omniauth
   module MicrosoftGraph
     VERSION = "2.0.2"
   end

omniauth-microsoft_graph.gemspec

@@ -5,7 +5,7 @@ require 'omniauth/microsoft_graph/version'
 
 Gem::Specification.new do |spec|
   spec.name          = "omniauth-microsoft_graph"
-  spec.version       = OmniAuth::MicrosoftGraph::VERSION
+  spec.version       = Omniauth::MicrosoftGraph::VERSION
   spec.authors       = ["Peter Philips", "Joel Van Horn"]
   spec.email         = ["pete@p373.net", "joel@joelvanhorn.com"]
   spec.summary       = %q{omniauth provider for Microsoft Graph}