CI: drop Dart 2.12 from tests, use new minimum 2.14.0 and Flutter 2.5.0.

Author: greenrobot-team

.github/workflows/dart.yml

@@ -47,8 +47,7 @@ jobs:
           - 2.17.0
           - 2.16.2
           - 2.15.1
-          - 2.14.4
-          - 2.12.0  # currently the lowest fully supported version (i.e. generator + lib)
+          - 2.14.0 # currently the lowest fully supported version (i.e. generator + lib)
     runs-on: ${{ matrix.os }}
     steps:
       - uses: dart-lang/setup-dart@v1
@@ -95,13 +94,11 @@ jobs:
           - ubuntu-20.04
         flutter-version:
           - 3.0.0
-          - 2.2.0
-          # 2.0.0 technically lowest supported, but need 2.2.0 to correctly resolve null safety dependencies.
-          # https://github.com/flutter/flutter/issues/77282
+          - 2.5.0 # currently the lowest fully supported version (i.e. generator + lib)
         include:
           - flutter-version: 3.0.0 # Flutter 2.9 and newer need Visual Studio 2022 to build desktop.
             os: windows-2022
-          - flutter-version: 2.2.0 # Flutter 2.8.1 and older need Visual Studio 2019 to build desktop.
+          - 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:

.gitlab-ci.yml

@@ -68,4 +68,4 @@ test-lib:linux:x64:
       # 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: [ '2.12', '2.14.4', '2.15.1', '2.16.1', '2.16.2', '2.17.0' ]
+      - DART_VERSION: [ '2.14', '2.15.1', '2.16.1', '2.16.2', '2.17.0' ]