Update gemspec and version number

Author: BenSandeen

lib/omniauth/facebook/version.rb

@@ -1,5 +1,5 @@
 module OmniAuth
   module Facebook
-    VERSION = '9.0.0'
+    VERSION = '9.0.1'
   end
 end

omniauth-facebook.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map { |f| File.basename(f) }
   s.require_paths = ['lib']
 
-  s.add_runtime_dependency 'omniauth-oauth2', '~> 1.2'
+  s.add_runtime_dependency 'omniauth-oauth2', '>= 1.2', '< 3'
 
   s.add_development_dependency 'minitest'
   s.add_development_dependency 'mocha'