deps: Add dev:checks

Author: gnprice

pubspec.lock

@@ -121,6 +121,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.2"
+  checks:
+    dependency: "direct dev"
+    description:
+      name: checks
+      sha256: "028fb54c181e68edc3c891d7d45813937311e29c77609f513bb5025620637ffd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.1"
   clock:
     dependency: transitive
     description:

pubspec.yaml

@@ -60,6 +60,7 @@ dev_dependencies:
   json_serializable: ^6.5.4
   build_runner: ^2.3.3
   test: ^1.23.1
+  checks: ^0.2.1
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec