fix: update SDK constraint to >=3.0.0 and upgrade GitHub Actions workflow to checkout@v4 and setup-dart@v1

Author: willyfromtheblock

.github/workflows/test.yaml

@@ -10,8 +10,8 @@ jobs:
   analyze-and-test-without-env:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: dart-lang/setup-dart@v1.5.0
+      - uses: actions/checkout@v4
+      - uses: dart-lang/setup-dart@v1
       - name: Install dependencies
         run: dart pub get
       - name: Analyze project source
@@ -28,8 +28,8 @@ jobs:
       PROTECTED_MODE: true
       RAPID_API_SECRET: ${{ secrets.RAPID_API_SECRET }}
     steps:
-      - uses: actions/checkout@v2
-      - uses: dart-lang/setup-dart@v1.5.0
+      - uses: actions/checkout@v4
+      - uses: dart-lang/setup-dart@v1
       - name: Install dependencies
         run: dart pub get
       - name: Run tests
@@ -43,8 +43,8 @@ jobs:
       RATING_MARGIN: 10
       PROTECTED_MODE: false
     steps:
-      - uses: actions/checkout@v2
-      - uses: dart-lang/setup-dart@v1.5.0
+      - uses: actions/checkout@v4
+      - uses: dart-lang/setup-dart@v1
       - name: Install dependencies
         run: dart pub get
       - name: Run tests

pubspec.yaml

@@ -4,7 +4,7 @@ version: 1.0.0
 repository: https://github.com/willyfromtheblock/strom_api
 
 environment:
-  sdk: '>=2.19.2 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 
 dev_dependencies:
   lints: ^3.0.0