refactor(dart_frog_dev): update to Dart 2.19 and Very Good Analysis 4.0.0 (#522)

Author: felangel

bricks/dart_frog_dev_server/hooks/analysis_options.yaml

@@ -1 +1 @@
-include: package:very_good_analysis/analysis_options.3.1.0.yaml
+include: package:very_good_analysis/analysis_options.4.0.0.yaml

bricks/dart_frog_dev_server/hooks/pubspec.yaml

@@ -2,7 +2,7 @@ name: dart_frog_dev_server_hooks
 publish_to: none
 
 environment:
-  sdk: ">=2.18.0 <3.0.0"
+  sdk: ">=2.19.0 <3.0.0"
 
 dependencies:
   dart_frog_gen: ^0.3.0
@@ -13,4 +13,4 @@ dev_dependencies:
   mocktail: ^0.3.0
   path: ^1.8.2
   test: ^1.19.2
-  very_good_analysis: ^3.1.0
+  very_good_analysis: ^4.0.0