Update to latest lints and cleanup (#309)

Author: kevmoo

CHANGELOG.md

@@ -1,4 +1,4 @@
-## 2.1.5-dev
+## 2.1.5-wip
 
 - Added an operator== to Quaternion so that two instances of quaternions can
   be evaluated for equality.

analysis_options.yaml

@@ -14,23 +14,17 @@ linter:
   - avoid_classes_with_only_static_members
   - avoid_private_typedef_functions
   - avoid_redundant_argument_values
-  - avoid_returning_null_for_future
   - avoid_returning_this
   - avoid_unused_constructor_parameters
   - avoid_void_async
   - cancel_subscriptions
-  - comment_references
   - join_return_with_assignment
   - literal_only_boolean_expressions
   - missing_whitespace_between_adjacent_strings
   - no_adjacent_strings_in_list
   - no_runtimeType_toString
   - package_api_docs
-  - prefer_const_constructors
   - prefer_expression_function_bodies
   - prefer_final_locals
-  - prefer_relative_imports
-  - test_types_in_equals
   - unnecessary_await_in_return
   - use_string_buffers
-  - use_super_parameters

pubspec.yaml

@@ -1,5 +1,5 @@
 name: vector_math
-version: 2.1.5-dev
+version: 2.1.5-wip
 description: A Vector Math library for 2D and 3D applications.
 repository: https://github.com/google/vector_math.dart
 
@@ -11,6 +11,6 @@ dev_dependencies:
   build_runner: ^2.0.0
   build_test: ^2.0.0
   build_web_compilers: ^4.0.0
-  dart_flutter_team_lints: ^1.0.0
+  dart_flutter_team_lints: ^2.0.0
   path: ^1.8.0
   test: ^1.16.0