Fix version constraint on pkg:pedantic

pkgs/package_config/pubspec.yaml

diff --git a/pkgs/package_config/pubspec.yaml b/pkgs/package_config/pubspec.yaml
index 5c05891..853c051 100644
--- a/pkgs/package_config/pubspec.yaml
+++ b/pkgs/package_config/pubspec.yaml
@@ -13,7 +13,7 @@
 dev_dependencies:
   test: ^1.6.4
   matcher: ^0.12.5
-  pedantic: ^1.8.0
+  pedantic: ^1.9.0
 
   build_runner: ^1.0.0
   build_web_compilers: ^2.0.0