fix: use extensions for all non-type imports

Author: keithamus

src/attr.ts

@@ -1,4 +1,4 @@
-import {CustomElement} from './custom-element'
+import type {CustomElement} from './custom-element'
 
 const attrs = new WeakMap<Record<PropertyKey, unknown>, string[]>()
 type attrValue = string | number | boolean

src/controller.ts

@@ -1,8 +1,8 @@
-import {register} from './register'
-import {bind} from './bind'
-import {autoShadowRoot} from './auto-shadow-root'
-import {defineObservedAttributes, initializeAttrs} from './attr'
-import {CustomElement} from './custom-element'
+import {register} from './register.js'
+import {bind} from './bind.js'
+import {autoShadowRoot} from './auto-shadow-root.js'
+import {defineObservedAttributes, initializeAttrs} from './attr.js'
+import type {CustomElement} from './custom-element'
 
 /**
  * Controller is a decorator to be used over a class that extends HTMLElement.

src/index.ts

@@ -1,6 +1,6 @@
-export {bind, listenForBind} from './bind'
-export {register} from './register'
-export {findTarget, findTargets} from './findtarget'
-export {target, targets} from './target'
-export {controller} from './controller'
-export {attr} from './attr'
+export {bind, listenForBind} from './bind.js'
+export {register} from './register.js'
+export {findTarget, findTargets} from './findtarget.js'
+export {target, targets} from './target.js'
+export {controller} from './controller.js'
+export {attr} from './attr.js'

src/register.ts

@@ -1,4 +1,4 @@
-import {CustomElement} from './custom-element'
+import type {CustomElement} from './custom-element'
 
 /**
  * Register the controller as a custom element.

src/target.ts

@@ -1,4 +1,4 @@
-import {findTarget, findTargets} from './findtarget'
+import {findTarget, findTargets} from './findtarget.js'
 
 /**
  * Target is a decorator which - when assigned to a property field on the