Update .editorconfig with settings from strider/client

Author: oliversalzburg

.editorconfig

@@ -15,6 +15,8 @@ charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
 
-# Settings specific to Markdown files
-[*.md]
-trim_trailing_whitespace = false
+[*.hbs]
+insert_final_newline = false
+
+[*.{diff,md}]
+trim_trailing_whitespace = false