Refactor code-style

Author: wooorm

.editorconfig

@@ -2,14 +2,8 @@ root = true
 
 [*]
 indent_style = space
-indent_size = 4
+indent_size = 2
 end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
-
-[*.{json,remarkrc,eslintrc,sh}]
-indent_size = 2
-
-[*.md]
-trim_trailing_whitespace = false