Run the publish with the pub version from flutter stable

.cirrus.yml

@@ -13,7 +13,9 @@ task:
   activate_script: pub global activate flutter_plugin_tools
   matrix:
     - name: publishable
-      script: ./script/check_publish.sh
+      script:
+        - flutter channel stable
+        - ./script/check_publish.sh
     - name: format
       install_script:
         - wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -

script/check_publish.sh

@@ -17,7 +17,7 @@ function check_publish() {
     echo "Checking that $package_name can be published."
     if [[ $(cd "$dir" && cat pubspec.yaml | grep -E "^publish_to: none") ]]; then
       echo "Package $package_name is marked as unpublishable. Skipping."
-    elif (cd "$dir" && pub publish --dry-run > /dev/null); then
+    elif (cd "$dir" && flutter pub publish -- --dry-run > /dev/null); then
       echo "Package $package_name is able to be published."
     else
       error "Unable to publish $package_name"