CI: increase lowest tested Dart [2.17.6] and Flutter SDK [3.0.5] (#25)

Author: greenrobot-team

.github/workflows/dart.yml

@@ -44,10 +44,9 @@ jobs:
           - macos-11
           - ubuntu-22.04
         sdk:
+          # Always include lowest supported version (see sdk key in objectbox and generator
+          # pubspec.yaml, but may be higher due to dependencies).
           - 2.17.6
-          - 2.16.2
-          - 2.15.1
-          - 2.14.0 # currently the lowest fully supported version (i.e. generator + lib)
     runs-on: ${{ matrix.os }}
     steps:
       - uses: dart-lang/setup-dart@v1
@@ -92,14 +91,11 @@ jobs:
         os:
           - macos-11
           - ubuntu-22.04
+          - windows-2022 # Flutter 2.9 and newer need Visual Studio 2022 to build desktop.
         flutter-version:
+          # Always include lowest supported version (based on lowest tested Dart SDK, see lib tests
+          # above): https://docs.flutter.dev/development/tools/sdk/releases lists included Dart SDK.
           - 3.0.5
-          - 2.5.0 # currently the lowest fully supported version (i.e. generator + lib)
-        include:
-          - flutter-version: 3.0.5 # Flutter 2.9 and newer need Visual Studio 2022 to build desktop.
-            os: windows-2022
-          - flutter-version: 2.5.0 # Flutter 2.8.1 and older need Visual Studio 2019 to build desktop.
-            os: windows-2019
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3

.gitlab-ci.yml

@@ -65,7 +65,8 @@ test-lib:linux:x64:
   needs: ["test-generator:linux:x64"] # Wait for generator test
   parallel:
     matrix:
-      # Note: use specific tags as docker images may not always be pulled due to "if-not-present" pull policy.
-      #       Thus, do not use tags like latest/beta, but check https://hub.docker.com/_/dart?tab=tags for latest.
-      # Always include lowest supported version (see sdk key in objectbox and generator pubspec.yaml).
-      - DART_VERSION: [ '2.14', '2.15.1', '2.16.1', '2.16.2', '2.17.6' ]
+      # Note: use specific versions instead of latest/beta tags as Docker images may not always be
+      # pulled due to "if-not-present" pull policy. Check https://hub.docker.com/_/dart?tab=tags.
+      # Always include lowest supported version (see sdk key in objectbox and generator
+      # pubspec.yaml, but may be higher due to dependencies).
+      - DART_VERSION: [ '2.17.6' ]