Configure editorConfig for package.json

Author: chrisvltn

.editorconfig

@@ -14,4 +14,9 @@ trim_trailing_whitespace = true
 insert_final_newline = true
 
 [*.md]
-trim_trailing_whitespace = false
+trim_trailing_whitespace = false
+
+[package.json]
+indent_style = space
+indent_size = 2
+insert_final_newline = true