Update .editorconfig

YAML-like files had no indent style set, thus resulting using the default, which is causing problems.

Author: runxel

.editorconfig

@@ -11,4 +11,8 @@ indent_size = 4
 [*.py]
 
 [syntax_test_gdl]
-indent_style = space
+indent_style = space
+
+[*.{sublime-syntax,yaml}]
+indent_style = space
+indent_size = 2