feat: expose listeners on context

Author: LinusBorg

src/setup.ts

@@ -216,7 +216,7 @@ export function mixin(Vue: VueConstructor) {
     const ctx = {
       slots: {},
     } as SetupContext;
-    const props: Array<string | [string, string]> = ['root', 'parent', 'refs', 'attrs'];
+    const props: Array<string | [string, string]> = ['root', 'parent', 'refs', 'attrs', 'listeners'];
     const methodReturnVoid = ['emit'];
     props.forEach(key => {
       let targetKey: string;

test/setupContext.spec.js

@@ -15,6 +15,7 @@ describe('setupContext', () => {
     expect(context.parent).toBe(vm.$parent);
     expect(context.slots).toBeDefined();
     expect(context.attrs).toBe(vm.$attrs);
+    expect(context.listeners).toBe(vm.$listeners);
 
     // CAUTION: this will be removed in 3.0
     expect(context.refs).toBe(vm.$refs);