Update actions (#55)

diff --git a/.github/workflows/test-package.yml b/.github/workflows/test-package.yml
index 2f5a52c..6caf97c 100644
--- a/.github/workflows/test-package.yml
+++ b/.github/workflows/test-package.yml
@@ -45,8 +45,8 @@
         os: [ubuntu-latest]
         sdk: [2.12.0, dev]
     steps:
-      - uses: actions/checkout@v2
-      - uses: dart-lang/setup-dart@v1.0
+      - uses: actions/checkout@v3
+      - uses: dart-lang/setup-dart@v1.3
         with:
           sdk: ${{ matrix.sdk }}
       - id: install