Default webrenderer is canvaskit

Author: FeodorFitsner

.appveyor.yml

@@ -263,7 +263,7 @@ for:
       # Flutter Web client
       - cd client
       - flutter test
-      - flutter build web --release --web-renderer canvaskit
+      - flutter build web --release
       - rm -rf build/web/canvaskit
       - ls -alR build/web
       - cd ..

sdk/python/flet/flet.py

@@ -44,7 +44,7 @@ def page(
     permissions=None,
     view: AppViewer = WEB_BROWSER,
     assets_dir=None,
-    web_renderer=None,
+    web_renderer='canvaskit',
 ):
     conn = _connect_internal(
         page_name=name,
@@ -84,7 +84,7 @@ def app(
         permissions=permissions,
         session_handler=target,
         assets_dir=assets_dir,
-        web_renderer=web_renderer,
+        web_renderer='canvaskit',
     )
     print("App URL:", conn.page_url)