make sure `DS.reset` is run before every DS & KV test run

test/github/ds_test.rb

@@ -1,13 +1,16 @@
 require "test_helper"
 
 class GitHub::DSTest < Minitest::Test
+  def setup
+    GitHub::DS.reset
+  end
+
   def test_configures_correctly
     GitHub::DS.configure do |config|
       config.table_name = "example_key_values"
     end
 
     assert_equal GitHub::DS.config.table_name, "example_key_values"
-    GitHub::DS.reset
   end
 
   def test_resets_correctly

test/github/kv_test.rb

@@ -4,6 +4,7 @@ class GitHub::KVTest < Minitest::Test
   def setup
     ActiveRecord::Base.connection.execute("TRUNCATE `key_values`")
     @kv = GitHub::KV.new { ActiveRecord::Base.connection }
+    GitHub::DS.reset
   end
 
   def test_initialize_without_connection