feat: scope the no-options slot (#1083)

Resolves #1071, Resolves #1081

https://vue-select.org/guide/slots.html#improving-the-default-no-options-text

tests/unit/Slots.spec.js

@@ -56,4 +56,20 @@ describe('Scoped Slots', () => {
 
       expect(Select.find({ref: 'dropdownMenu'}).text()).toEqual('onetwothree');
     });
+
+  it('noOptions slot receives the current search text', async () => {
+    const noOptions = jest.fn();
+    const Select = mountDefault({}, {
+      scopedSlots: {'no-options': noOptions},
+    });
+
+    Select.vm.search = 'something not there';
+    Select.vm.open = true;
+    await Select.vm.$nextTick();
+
+    expect(noOptions).toHaveBeenCalledWith({
+      search: 'something not there',
+      searching: true,
+    })
+  });
 });