update editorconfig

.editorconfig

@@ -1,13 +1,18 @@
+; This file is for unifying the coding style for different editors and IDEs.
+; More information at https://editorconfig.org
+
 root = true
 
-# All files.
 [*]
-end_of_line = LF
-indent_style = space
-indent_size = 4
 charset = utf-8
-trim_trailing_whitespace = true
+indent_size = 4
+indent_style = space
+end_of_line = lf
 insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
 
 [composer.{json,lock}]
 indent_size = 4