Centralize analysis options (#957)

animations/analysis_options.yaml

@@ -1,21 +1,6 @@
-include: package:flutter_lints/flutter.yaml
-
-analyzer:
-  strong-mode:
-    implicit-casts: false
-    implicit-dynamic: false
+include: ../analysis_options.yaml
 
 linter:
   rules:
-    avoid_types_on_closure_parameters: true
-    avoid_void_async: true
-    cancel_subscriptions: true
-    close_sinks: true
-    directives_ordering: true
     # Required because of the numbered sources in  lib/src/basics
     file_names: false
-    package_api_docs: true
-    package_prefixed_library_names: true
-    test_types_in_equals: true
-    throw_in_finally: true
-    unnecessary_statements: true