[FIX] component: updateProps: validation and default values

Before this rev., default values weren't taken into account when
validating props whenever a component was updated. Moreover, there
was no test attesting that props were validated at update.

src/component/component.ts

@@ -503,6 +503,9 @@ export class Component<T extends Env, Props extends {}> {
       if (defaultProps) {
         nextProps = this.__applyDefaultProps(nextProps, defaultProps);
       }
+      if (QWeb.dev) {
+        QWeb.utils.validateProps(this.constructor, nextProps);
+      }
       await Promise.all([
         this.willUpdateProps(nextProps),
         __owl__.willUpdatePropsCB && __owl__.willUpdatePropsCB(nextProps)

src/component/directive.ts

@@ -412,9 +412,6 @@ QWeb.addDirective({
       // disable the patch queue
       patchQueueCode = `w${componentID}.__owl__.isMounted ? extra.fiber : fiber${componentID}`;
     }
-    if (QWeb.dev) {
-      ctx.addLine(`utils.validateProps(w${componentID}.constructor, props${componentID})`);
-    }
     let styleCode = "";
     if (tattStyle) {
       styleCode = `.then(()=>{if (w${componentID}.__owl__.isDestroyed) {return};w${componentID}.el.style=${tattStyle};});`;