simplify editorconfig and avoid forcing tabstops for .js files (preac…

…tjs#315)

.editorconfig

@@ -7,14 +7,9 @@ charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
 
-[{*.js,*.less}]
-indent_size = 2
-
-[{package.json,.*rc,*.yml}]
+[{*.md,*.json,.*rc,*.yml}]
 indent_style = space
 indent_size = 2
 
 [*.md]
 trim_trailing_whitespace = false
-indent_style = space
-indent_size = 4