feat: Vue 3 Support (#1344)

BREAKING CHANGE: drop vue 2 support

tests/unit/Labels.spec.js

@@ -7,7 +7,7 @@ describe('Labels', () => {
     const Select = selectWithProps({
       options: [{ name: 'Foo' }],
       label: 'name',
-      value: { name: 'Foo' },
+      modelValue: { name: 'Foo' },
     })
     expect(Select.find('.vs__selected').text()).toBe('Foo')
   })
@@ -29,7 +29,7 @@ describe('Labels', () => {
 
   it('should display a placeholder if the value is empty', () => {
     const Select = shallowMount(VueSelect, {
-      propsData: {
+      props: {
         options: ['one'],
       },
       attrs: {
@@ -66,7 +66,7 @@ describe('Labels', () => {
     xit('will not call getOptionLabel if both scoped option slots are used and a filter is provided', () => {
       const spy = spyOn(VueSelect.props.getOptionLabel, 'default')
       const Select = shallowMount(VueSelect, {
-        propsData: {
+        props: {
           options: [{ name: 'one' }],
           filter: () => {},
         },