[IMP] component: use reactivity to allow shallow renderings

With this commit, component only render child
components if they have different props (shallow
equality). Otherwise, we trust the reactivity
system to make sure that all impacted components
are updated

tests/components/lifecycle.test.ts

@@ -849,8 +849,9 @@ describe("lifecycle hooks", () => {
 
     class Parent extends Component {
       static template = xml`
-        <Child />`;
+        <Child someValue="state.value" />`;
       static components = { Child };
+      state = useState({ value: 1 });
       setup() {
         useLogLifecycle();
       }
@@ -871,7 +872,7 @@ describe("lifecycle hooks", () => {
       "Parent:mounted",
     ]).toBeLogged();
 
-    parent.render(); // to block child render
+    parent.state.value++; // to block child render
     await nextTick();
     expect(["Parent:willRender", "Child:willUpdateProps", "Parent:rendered"]).toBeLogged();
 
@@ -1008,20 +1009,15 @@ describe("lifecycle hooks", () => {
     await nextTick();
     expect([
       "C:willRender",
-      "D:willUpdateProps",
       "F:setup",
       "F:willStart",
       "C:rendered",
-      "D:willRender",
-      "D:rendered",
       "F:willRender",
       "F:rendered",
       "C:willPatch",
-      "D:willPatch",
       "E:willUnmount",
       "E:willDestroy",
       "F:mounted",
-      "D:patched",
       "C:patched",
     ]).toBeLogged();
   });