Update subosito/flutter-action action to v2.18.0 (#1376)

Author: renovate[bot]

.github/workflows/backward_compatibility.yml

@@ -72,17 +72,13 @@ jobs:
           # restore SDK constraint
           yq e ".environment.sdk = \"${_sdkVersion}\"" -i pubspec.yaml
 
-          # extract Flutter version to install later
-          _flutterVersion=$( yq e '.environment.flutter' pubspec.yaml | sed -e 's/^>=//' | sed -e 's/-0$//' )
-          echo "FLUTTER_VERSION=${_flutterVersion}" >> $GITHUB_ENV
-
           # output for debugging
           cat pubspec.yaml
 
       - name: Setup Flutter
-        uses: subosito/flutter-action@44ac965b96f18d999802d4b807e3256d5a3f9fa1 # v2.16.0
+        uses: subosito/flutter-action@f2c4f6686ca8e8d6e6d0f28410eeef506ed66aff # v2.18.0
         with:
-          flutter-version: ${{ env.FLUTTER_VERSION }}
+          flutter-version-file: packages/${{ matrix.package }}/pubspec.yaml
       - run: flutter test
 
   core:
@@ -116,7 +112,7 @@ jobs:
           # output for debugging
           cat pubspec.yaml
       - name: Setup Flutter
-        uses: subosito/flutter-action@44ac965b96f18d999802d4b807e3256d5a3f9fa1 # v2.16.0
+        uses: subosito/flutter-action@f2c4f6686ca8e8d6e6d0f28410eeef506ed66aff # v2.18.0
         with:
           channel: ${{ matrix.channel }}
       - run: flutter test

.github/workflows/demo_app.yml

@@ -25,7 +25,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Setup Flutter
-        uses: subosito/flutter-action@44ac965b96f18d999802d4b807e3256d5a3f9fa1 # v2.16.0
+        uses: subosito/flutter-action@f2c4f6686ca8e8d6e6d0f28410eeef506ed66aff # v2.18.0
         with:
           cache: true
       - uses: gradle/actions/setup-gradle@94baf225fe0a508e581a564467443d0e2379123b # v4.3.0

.github/workflows/flutter.yml

@@ -24,7 +24,7 @@ jobs:
       - uses: actions/dependency-review-action@3b139cfc5fae8b618d3eae3675e383bb1769c019 # v4.5.0
         if: github.base_ref
       - name: Setup Flutter
-        uses: subosito/flutter-action@44ac965b96f18d999802d4b807e3256d5a3f9fa1 # v2.16.0
+        uses: subosito/flutter-action@f2c4f6686ca8e8d6e6d0f28410eeef506ed66aff # v2.18.0
         with:
           cache: true
 

.github/workflows/flutter_beta.yml

@@ -23,7 +23,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Setup Flutter
-        uses: subosito/flutter-action@44ac965b96f18d999802d4b807e3256d5a3f9fa1 # v2.16.0
+        uses: subosito/flutter-action@f2c4f6686ca8e8d6e6d0f28410eeef506ed66aff # v2.18.0
         with:
           channel: beta
       - run: ./tool/test.sh

.github/workflows/flutter_master.yml

@@ -23,7 +23,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Setup Flutter
-        uses: subosito/flutter-action@44ac965b96f18d999802d4b807e3256d5a3f9fa1 # v2.16.0
+        uses: subosito/flutter-action@f2c4f6686ca8e8d6e6d0f28410eeef506ed66aff # v2.18.0
         with:
           channel: master
       - run: ./tool/test.sh

.github/workflows/integration_test.yml

@@ -20,7 +20,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Setup Flutter
-        uses: subosito/flutter-action@44ac965b96f18d999802d4b807e3256d5a3f9fa1 # v2.16.0
+        uses: subosito/flutter-action@f2c4f6686ca8e8d6e6d0f28410eeef506ed66aff # v2.18.0
         with:
           cache: true
       - uses: gradle/actions/setup-gradle@94baf225fe0a508e581a564467443d0e2379123b # v4.3.0
@@ -67,7 +67,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Setup Flutter
-        uses: subosito/flutter-action@44ac965b96f18d999802d4b807e3256d5a3f9fa1 # v2.16.0
+        uses: subosito/flutter-action@f2c4f6686ca8e8d6e6d0f28410eeef506ed66aff # v2.18.0
         with:
           cache: true