upgrade dart dependencies (#915)

Co-authored-by: sensuikan1973 <sensuikan1973@users.noreply.github.com>

Author: sensuikan1973

example/pubspec.lock

@@ -5,18 +5,18 @@ packages:
     dependency: transitive
     description:
       name: _fe_analyzer_shared
-      sha256: "8d718c5c58904f9937290fd5dbf2d6a0e02456867706bfb6cd7b81d394e738d5"
+      sha256: a49d6cf99e8d8e7a8e93668d09ced0bbdb954d0b4fccc2f5f9241c6b87fad95c
       url: "https://pub.dev"
     source: hosted
-    version: "98.0.0"
+    version: "99.0.0"
   analyzer:
     dependency: "direct dev"
     description:
       name: analyzer
-      sha256: "6141ad5d092d1e1d13929c0504658bbeccc1703505830d7c26e859908f5efc88"
+      sha256: "663efa951fb8a45e06f491223a604c93820598f20e6a99c25617a1576065e8b7"
       url: "https://pub.dev"
     source: hosted
-    version: "12.0.0"
+    version: "12.1.0"
   async:
     dependency: transitive
     description:

example/pubspec.yaml

@@ -11,5 +11,5 @@ dependencies:
     path: ..
 
 dev_dependencies:
-  analyzer: ^12.0.0
+  analyzer: ^12.1.0
   pedantic_sensuikan1973: ^5.16.0