[corpus] update to latest analyzer, bump min SDK (#334)

Test on oldest supported SDK
Check format with dev SDK

.github/workflows/corpus.yml

@@ -26,7 +26,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        sdk: [stable, dev]
+        sdk: [3.6, dev]
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
       - uses: dart-lang/setup-dart@e630b99d28a3b71860378cafdc2a067c71107f94
@@ -38,6 +38,6 @@ jobs:
       - run: dart analyze --fatal-infos
 
       - run: dart format --output=none --set-exit-if-changed .
-        if: ${{ matrix.sdk == 'stable' }}
+        if: ${{ matrix.sdk == 'dev' }}
 
       - run: dart test

pkgs/corpus/lib/api.dart

@@ -180,9 +180,7 @@ class ApiUseCollector extends RecursiveAstVisitor implements SurveyorVisitor {
       return;
     }
 
-    //TODO: fix as soon as enclosingElement3 is on Dart stable
-    // ignore: deprecated_member_use
-    var enclosingElement = element.enclosingElement!;
+    var enclosingElement = element.enclosingElement3!;
 
     if (enclosingElement.kind == ElementKind.CLASS) {
       final name = enclosingElement.name!;

pkgs/corpus/pubspec.yaml

@@ -4,20 +4,20 @@ description: A tool to calculate the API usage for a package.
 publish_to: none
 
 environment:
-  sdk: ^3.1.0
+  sdk: ^3.6.0
 
 dependencies:
-  analyzer: ^6.0.0
-  args: ^2.0.0
+  analyzer: ^7.0.0
+  args: ^2.1.0
   cli_util: ^0.4.0
-  collection: ^1.16.0
+  collection: ^1.19.0
   http: ^1.0.0
-  path: ^1.8.0
-  pub_semver: ^2.0.0
+  path: ^1.9.0
+  pub_semver: ^2.1.4
   yaml: ^3.0.0
 
 dev_dependencies:
   checks: ^0.3.0
   dart_flutter_team_lints: ^3.0.0
-  test: ^1.22.0
+  test: ^1.25.9
   test_descriptor: ^2.0.0