Add 2.10 tag, Change dev to experimental

Author: Liklainy

.github/workflows/test.yml

@@ -5,23 +5,31 @@ on: [push, pull_request]
 jobs:
   test:
     runs-on: ubuntu-latest
-
+    continue-on-error: ${{ matrix.experimental }}
     strategy:
-      fail-fast: false
       matrix:
-        tag: [latest, dev]
+        tag: [2.10, latest]
+        experimental: [false]
+        include:
+          - tag: dev
+            experimental: true
 
     container:
       image:  google/dart:${{ matrix.tag }}
 
     steps:
     - uses: actions/checkout@v2
 
+    - name: Upgrade dependencies
+      if: ${{ matrix.experimental }}
+      run: dart pub upgrade
+
     - name: Install dependencies
-      run: pub get
+      if: ${{ !matrix.experimental }}
+      run: dart pub get
 
     - name: Check Stage formatting
-      run: pub run bin/check_formatting.dart
+      run: dart run bin/check_formatting.dart
 
     - name: Run tests
-      run: pub run test
+      run: dart test