Add "latest" to action test workflow

Author: socheatsok78

.github/workflows/dart.yml

@@ -17,7 +17,8 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        version: 
+        version:
+          - latest
           - 3.3.0
           - 3.0.0
           - 2.10.5
@@ -47,7 +48,8 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        version: 
+        version:
+          - latest
           - 3.3.0-0.0.pre
           - 3.1.0
     steps: