drop outdated lints (#78)

analysis_options.yaml

diff --git a/analysis_options.yaml b/analysis_options.yaml
index 0354653..543787c 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -7,12 +7,7 @@
 
 linter:
   rules:
-    - avoid_returning_null
     - avoid_unused_constructor_parameters
     - cancel_subscriptions
-    - comment_references
     - no_adjacent_strings_in_list
     - package_api_docs
-    - prefer_const_constructors
-    - test_types_in_equals
-    - use_super_parameters

pubspec.yaml

diff --git a/pubspec.yaml b/pubspec.yaml
index de8c6d2..7e8428a 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -14,5 +14,5 @@
   collection: ^1.15.0
 
 dev_dependencies:
-  dart_flutter_team_lints: ^1.0.0
+  dart_flutter_team_lints: ^2.0.0
   test: ^1.16.0