Stop passing experiment flags to parser for features that have shipped.

Fix #1245.

CHANGELOG.md

@@ -1,7 +1,8 @@
 ## 2.3.3-dev
 
-* Remove support for `inline class` since that syntax has changed.
 * Fix regression in splitting type annotations with library prefixes (#1249).
+* Remove support for `inline class` since that syntax has changed.
+* Stop passing experiment flags to parser for features that have shipped.
 
 ## 2.3.2
 

lib/src/dart_formatter.dart

@@ -202,17 +202,15 @@ class DartFormatter {
       {required bool patterns}) {
     // Enable all features that are enabled by default in the current analyzer
     // version.
-    var featureSet = FeatureSet.fromEnableFlags2(
-      sdkLanguageVersion: Version(2, 19, 0),
-      flags: [
-        'inline-class',
-        'class-modifiers',
-        if (patterns) 'patterns',
-        'records',
-        'sealed-class',
-        'unnamed-libraries',
-      ],
-    );
+    FeatureSet featureSet;
+    if (patterns) {
+      featureSet = FeatureSet.latestLanguageVersion();
+    } else {
+      featureSet = FeatureSet.fromEnableFlags2(
+        sdkLanguageVersion: Version(2, 19, 0),
+        flags: [],
+      );
+    }
 
     return parseString(
       content: source,

pubspec.yaml

@@ -9,7 +9,7 @@ environment:
   sdk: "^3.0.0"
 
 dependencies:
-  analyzer: '>=5.12.0 <7.0.0'
+  analyzer: '^6.2.0'
   args: ">=1.0.0 <3.0.0"
   path: ^1.0.0
   pub_semver: ">=1.4.4 <3.0.0"
@@ -22,7 +22,7 @@ dev_dependencies:
   # and publishing to npm hasn't been used in a while.
   #  node_preamble: ^1.0.0
   lints: ^2.0.0
-  test: ^1.16.8
+  test: ^1.24.6
   test_descriptor: ^2.0.0
   test_process: ^2.0.0
   yaml: ">=2.0.0 <4.0.0"