chore(.editorconfig): add editorconfig

.editorconfig

@@ -0,0 +1,11 @@
+[*.js]
+indent_style = space;
+indent_size = 2;
+insert_final_newline = true;
+quote_type = single;
+space_after_anonymous_functions = true;
+space_after_control_statements = true;
+spaces_around_operators = true;
+trim_trailing_whitespace = true;
+spaces_in_brackets = false;
+end_of_line = lf;