Flutter 1.17 updates (#432)

* Material text theme updates & flutter pub upgrade (#411)

* Beta channel updates (#412)

* fix deprecated usages in provider_shopper - beta channel

* fix deprecated usages in animations - beta channel

* fix deprecated usages in provider_counter - beta

* Updates additional samples for beta release (#416)

* use headline6 instead of title

* fix another title -> headline6

Co-authored-by: Brett Morgan <brett.morgan@gmail.com>
Co-authored-by: Andrew Brogdon <RedBrogdon@users.noreply.github.com>

provider_shopper/lib/common/theme.dart

@@ -7,7 +7,7 @@ import 'package:flutter/material.dart';
 final appTheme = ThemeData(
   primarySwatch: Colors.yellow,
   textTheme: TextTheme(
-    display4: TextStyle(
+    headline2: TextStyle(
       fontFamily: 'Corben',
       fontWeight: FontWeight.w700,
       fontSize: 24,