appveyor.yml in rubyserial-0.3.0 vs appveyor.yml in rubyserial-0.4.0

@@ -18,9 +18,11 @@
   - SET CODECLIMATE_REPO_TOKEN=70754a8aa666790236dbbb910727648f4dbb1f73a28f886d0b0c9e39a36b5a79
   - bundle exec rspec -fd
 
 environment:
   matrix:
-    - ruby_version: "200-x64"
-    - ruby_version: "21-x64"
+    - ruby_version: 22
+    - ruby_version: 21
+    - ruby_version: 200
+    - ruby_version: 193
 
 build: off