added #bearer_auth helper in authentication pluginn

lib/httpx/plugins/authentication.rb

@@ -13,6 +13,10 @@ module HTTPX
         def authentication(token)
           with(headers: { "authorization" => token })
         end
+
+        def bearer_auth(token)
+          authentication("Bearer #{token}")
+        end
       end
     end
     register_plugin :authentication, Authentication

sig/plugins/authentication.rbs

@@ -3,6 +3,8 @@ module HTTPX
     module Authentication
       module InstanceMethods
         def authentication: (string token) -> instance
+
+        def bearer_auth: (string token) -> instance
       end
     end
 

test/support/requests/plugins/authentication.rb

@@ -3,6 +3,17 @@
 module Requests
   module Plugins
     module Authentication
+      # Bearer Auth
+
+      def test_plugin_bearer_auth
+        get_uri = build_uri("/get")
+        session = HTTPX.plugin(:authentication)
+        response = session.bearer_auth("TOKEN").get(get_uri)
+        verify_status(response, 200)
+        body = json_body(response)
+        verify_header(body["headers"], "Authorization", "Bearer TOKEN")
+      end
+
       # Basic Auth
 
       def test_plugin_basic_authentication