chore: support analyzer 3.0.x

Author: dkrutskikh

CHANGELOG.md

@@ -9,6 +9,8 @@
 * chore: activate language strict rules
 * fix: add missing severity for rules
 * feat: facelift console reporters
+* chore: restrict `analyzer` version to `>=2.4.0 <3.1.0`.
+* chore: restrict `analyzer_plugin` version to `>=0.8.0 <0.10.0`.
 
 ## 4.8.1
 

pubspec.yaml

@@ -10,8 +10,8 @@ environment:
   sdk: ">=2.14.0 <3.0.0"
 
 dependencies:
-  analyzer: ">=2.4.0 <2.9.0"
-  analyzer_plugin: ^0.8.0
+  analyzer: ">=2.4.0 <3.1.0"
+  analyzer_plugin: ">=0.8.0 <0.10.0"
   ansicolor: ^2.0.1
   args: ^2.0.0
   collection: ^1.15.0