[IMP] component,qweb: props validation

We re-add the possibility to validate props when dev mode is active.
No change in the API right Now. The dev mode is activated via the
configure method of App class.

tests/components/lifecycle.test.ts

@@ -1070,7 +1070,7 @@ describe("lifecycle hooks", () => {
     class Child extends Component {
       static template = xml`<div>child</div>`;
       setup() {
-        useLogLifecycle(steps)
+        useLogLifecycle(steps);
       }
     }
 
@@ -1110,7 +1110,7 @@ describe("lifecycle hooks", () => {
       "Child:render",
       "Parent:willPatch",
       "Child:mounted",
-      "Parent:patched"
+      "Parent:patched",
     ]);
     Object.freeze(steps);
   });