• Add Example tab to https://pub-web.flutter-io.cn/packages/lint

• Disable one_member_abstracts #2
• Disable sort_constructors_first #1

New version schema:

• 0.3.0+dart202: Dart 2.2 Release sdk: '>=2.2.0 <2.3.0'
• 0.3.0+dart203: Dart 2.3 Release sdk: '>=2.3.0 <2.4.0'
• 0.3.0+dart204: Dart 2.4 Release sdk: '>=2.4.0 <2.5.0'
• 0.3.0+dart205: Dart 2.5 Release sdk: '>=2.5.0 <3.0.0'

• Release for Dart 2.5 enables
  • avoid_print

• Release for Dart 2.4 enables
  • prefer_if_null_operators
  • sort_child_properties_last
  • unsafe_html

• Release for Dart 2.3 enables
  • prefer_for_elements_to_map_fromIterable
  • prefer_if_elements_to_conditional_expressions
  • prefer_inlined_adds
  • prefer_spread_collections

• Fix analysis_options_package.yaml (wrong import)
• Release for Dart 2.2. All incompatible rules are removed

• pubspec.yaml homepage fix

• app rule set analysis_options_package.yaml
• package rule set analysis_options_package.yaml