feat: update required version #304 (#306)

Author: wasabeef

packages/core/pubspec.yaml

@@ -25,7 +25,7 @@ dependencies:
   glob: '>=2.0.0 <3.0.0'
 
   dart_style: '>=2.0.0 <3.0.0'
-  analyzer: '>=2.0.0 <5.0.0'
+  analyzer: '>=4.7.0 <6.0.0'
   args: '>=2.0.0 <3.0.0'
   pub_semver: '>=2.0.0 <3.0.0'
   source_span: '>=1.8.0 <2.0.0'