style: use imports with suffix

lib/index.js

@@ -1,14 +1,14 @@
-export { assign as assignStyle } from './style';
-export { default as attr } from './attr';
-export { default as classes } from './classes';
-export { default as clear } from './clear';
-export { default as closest } from './closest';
-export { default as delegate } from './delegate';
-export { default as domify } from './domify';
-export { default as event } from './event';
-export { default as matches } from './matches';
+export { assign as assignStyle } from './style.js';
+export { default as attr } from './attr.js';
+export { default as classes } from './classes.js';
+export { default as clear } from './clear.js';
+export { default as closest } from './closest.js';
+export { default as delegate } from './delegate.js';
+export { default as domify } from './domify.js';
+export { default as event } from './event.js';
+export { default as matches } from './matches.js';
 export {
   default as query,
   all as queryAll
-} from './query';
-export { default as remove } from './remove';
+} from './query.js';
+export { default as remove } from './remove.js';