Add support to all db: tasks in the Rails command

Closes #640.

Author: rafaelfranca

lib/spring/client/rails.rb

@@ -22,6 +22,8 @@ def call
 
         if COMMANDS.include?(command_name)
           Run.call(["rails_#{command_name}", *args.drop(2)])
+        elsif command_name.start_with?("db:")
+          Run.call(["rake", *args.drop(1)])
         else
           require "spring/configuration"
           ARGV.shift

test/support/acceptance_test.rb

@@ -630,6 +630,12 @@ def exec_name
         app.env["DISABLE_SPRING"] = "1"
         refute_output_includes "bin/rails runner ''", stderr: "WARN"
       end
+
+      test "rails db:migrate" do
+        assert_speedup do
+          2.times { app.run "bin/rails db:migrate" }
+        end
+      end
     end
   end
 end