refactor(types): use stricter settings

fix #847

packages/runtime-dom/src/directives/vModel.ts

@@ -11,11 +11,11 @@ import { isArray, looseEqual, looseIndexOf } from '@vue/shared'
 const getModelAssigner = (vnode: VNode): ((value: any) => void) =>
   vnode.props!['onUpdate:modelValue']
 
-function onCompositionStart(e: CompositionEvent) {
+function onCompositionStart(e: Event) {
   ;(e.target as any).composing = true
 }
 
-function onCompositionEnd(e: CompositionEvent) {
+function onCompositionEnd(e: Event) {
   const target = e.target as any
   if (target.composing) {
     target.composing = false

packages/runtime-dom/src/directives/vOn.ts

@@ -6,7 +6,7 @@ type KeyedEvent = KeyboardEvent | MouseEvent | TouchEvent
 
 const modifierGuards: Record<
   string,
-  (e: Event, modifiers?: string[]) => void | boolean
+  (e: Event, modifiers: string[]) => void | boolean
 > = {
   stop: e => e.stopPropagation(),
   prevent: e => e.preventDefault(),
@@ -18,7 +18,7 @@ const modifierGuards: Record<
   left: e => 'button' in e && (e as MouseEvent).button !== 0,
   middle: e => 'button' in e && (e as MouseEvent).button !== 1,
   right: e => 'button' in e && (e as MouseEvent).button !== 2,
-  exact: (e, modifiers: string[]) =>
+  exact: (e, modifiers) =>
     systemModifiers.some(m => (e as any)[`${m}Key`] && !modifiers.includes(m))
 }