[FIX] components: do not crash when binding anonymous function

It is not really useful, but it is possible to bind an anonymous
function prop. However, with the recent change on how the bind feature
works, it now crashes.

This commit makes sure that we properly apply the `bind` operation to
the function, and not to the last term of the function.

tests/components/props.test.ts

@@ -200,6 +200,31 @@ test("can bind function prop with bind suffix", async () => {
   expect(fixture.innerHTML).toBe("child");
 });
 
+test("do not crash when binding anonymous function prop with bind suffix", async () => {
+  class Child extends Component {
+    static template = xml`child`;
+    setup() {
+      this.props.doSomething(123);
+    }
+  }
+
+  let boundedThing: any = null;
+
+  class Parent extends Component {
+    static template = xml`<Child doSomething.bind="(val) => this.doSomething(val)"/>`;
+    static components = { Child };
+
+    doSomething(val: number) {
+      expect(val).toBe(123);
+      boundedThing = this;
+    }
+  }
+
+  const parent = await mount(Parent, fixture);
+  expect(boundedThing).toBe(parent);
+  expect(fixture.innerHTML).toBe("child");
+});
+
 test("bound functions is not referentially equal after update", async () => {
   let isEqual = false;
   class Child extends Component {