Introduce rubocop check to activesupport

[ksss]

This change allows rubocop to perform style checks on changes to activesupport.

• Update rubocop-on-rbs v1.3.0
• Add .rubocop.yml to activesupport
• Apply rubocop -a

rubocop log

Offenses:

gems/activesupport/6.0/activesupport-generated.rbs:224:50: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
      def self.supports_cache_versioning?: () -> ::TrueClass
                                                 ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:248:75: C: [Corrected] RBS/Style/RedundantParentheses: Don't use parentheses around simple type.
      def write_entry: (untyped key, untyped entry, **untyped options) -> (bool)
                                                                          ^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:248:76: C: [Corrected] RBS/Style/ClassicType: Use false instead of ::FalseClass
      def write_entry: (untyped key, untyped entry, **untyped options) -> (::FalseClass | ::TrueClass)
                                                                           ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:248:76: C: [Corrected] RBS/Style/TrueFalse: Use bool instead of ::FalseClass | ::TrueClass
      def write_entry: (untyped key, untyped entry, **untyped options) -> (::FalseClass | ::TrueClass)
                                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:248:76: C: [Corrected] RBS/Style/TrueFalse: Use bool instead of false | true
      def write_entry: (untyped key, untyped entry, **untyped options) -> (false | true)
                                                                           ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:248:91: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
      def write_entry: (untyped key, untyped entry, **untyped options) -> (::FalseClass | ::TrueClass)
                                                                                          ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:298:50: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
      def self.supports_cache_versioning?: () -> ::TrueClass
                                                 ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:378:50: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
      def self.supports_cache_versioning?: () -> ::TrueClass
                                                 ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:414:76: C: [Corrected] RBS/Style/ClassicType: Use false instead of ::FalseClass
      def write_entry: (untyped key, untyped entry, **untyped options) -> (::FalseClass | untyped)
                                                                           ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:434:50: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
      def self.supports_cache_versioning?: () -> ::TrueClass
                                                 ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:450:75: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
      def write_entry: (untyped key, untyped entry, **untyped options) -> ::TrueClass
                                                                          ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:452:61: C: [Corrected] RBS/Style/ClassicType: Use false instead of ::FalseClass
      def delete_entry: (untyped key, **untyped options) -> ::FalseClass
                                                            ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:491:50: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
      def self.supports_cache_versioning?: () -> ::TrueClass
                                                 ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:670:79: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
          def write_entry: (untyped key, untyped value, **untyped options) -> ::TrueClass
                                                                              ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:795:1: C: [Corrected] RBS/Layout/EmptyLines: Extra blank line detected.
gems/activesupport/6.0/activesupport-generated.rbs:795:5: W: [Corrected] RBS/Lint/UselessAccessModifier: Useless private access modifier.
    private
    ^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:803:1: C: [Corrected] RBS/Layout/EmptyLines: Extra blank line detected.
gems/activesupport/6.0/activesupport-generated.rbs:803:5: W: [Corrected] RBS/Lint/UselessAccessModifier: Useless public access modifier.
    public
    ^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:2173:30: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
  def acts_like_date?: () -> ::TrueClass
                             ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:2183:21: C: [Corrected] RBS/Style/ClassicType: Use false instead of ::FalseClass
  def blank?: () -> ::FalseClass
                    ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:2594:30: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
  def acts_like_date?: () -> ::TrueClass
                             ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:2597:30: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
  def acts_like_time?: () -> ::TrueClass
                             ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:2607:21: C: [Corrected] RBS/Style/ClassicType: Use false instead of ::FalseClass
  def blank?: () -> ::FalseClass
                    ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:4297:26: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
  def duplicable?: () -> ::TrueClass
                         ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:4305:26: C: [Corrected] RBS/Style/ClassicType: Use false instead of ::FalseClass
  def duplicable?: () -> ::FalseClass
                         ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:4313:26: C: [Corrected] RBS/Style/ClassicType: Use false instead of ::FalseClass
  def duplicable?: () -> ::FalseClass
                         ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:4768:32: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
  def acts_like_string?: () -> ::TrueClass
                               ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:5081:25: C: [Corrected] RBS/Style/ClassicType: Use false instead of ::FalseClass
  def html_safe?: () -> ::FalseClass
                        ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:5085:25: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
  def html_safe?: () -> ::TrueClass
                        ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:5192:30: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
  def acts_like_time?: () -> ::TrueClass
                             ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:5725:1: C: [Corrected] RBS/Layout/EmptyLines: Extra blank line detected.
gems/activesupport/6.0/activesupport-generated.rbs:5726:7: W: [Corrected] RBS/Lint/UselessAccessModifier: Useless private access modifier.
      private
      ^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:5970:41: C: [Corrected] RBS/Style/ClassicType: Use false instead of ::FalseClass
    def autoloaded?: (untyped desc) -> (::FalseClass | untyped)
                                        ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:6488:28: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
      def validate!: () -> ::TrueClass
                           ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:7099:37: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
    def extractable_options?: () -> ::TrueClass
                                    ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:7909:1: C: [Corrected] RBS/Layout/EmptyLines: Extra blank line detected.
gems/activesupport/6.0/activesupport-generated.rbs:7911:5: W: [Corrected] RBS/Lint/UselessAccessModifier: Useless private access modifier.
    private
    ^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:9003:49: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
          def subscribed_to?: (untyped name) -> ::TrueClass
                                                ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:9005:35: C: [Corrected] RBS/Style/ClassicType: Use false instead of ::FalseClass
          def unsubscribe!: () -> ::FalseClass
                                  ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:9913:37: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
    def extractable_options?: () -> ::TrueClass
                                    ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:11157:32: C: [Corrected] RBS/Style/ClassicType: Use true instead of ::TrueClass
    def acts_like_time?: () -> ::TrueClass
                               ^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:11165:23: C: [Corrected] RBS/Style/ClassicType: Use false instead of ::FalseClass
    def blank?: () -> ::FalseClass
                      ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:11175:60: C: [Corrected] RBS/Style/ClassicType: Use false instead of ::FalseClass
    def respond_to?: (untyped sym, ?bool include_priv) -> (::FalseClass | untyped)
                                                           ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:11179:70: C: [Corrected] RBS/Style/ClassicType: Use false instead of ::FalseClass
    def respond_to_missing?: (untyped sym, untyped include_priv) -> (::FalseClass | untyped)
                                                                     ^^^^^^^^^^^^
gems/activesupport/6.0/activesupport-generated.rbs:11803:1: C: [Corrected] RBS/Layout/EmptyLines: Extra blank line detected.
gems/activesupport/6.0/activesupport-generated.rbs:11806:3: W: [Corrected] RBS/Lint/UselessAccessModifier: Useless public access modifier.
  public
  ^^^^^^
gems/activesupport/6.0/activesupport.rbs:237:28: C: [Corrected] RBS/Layout/OverloadIndentation: Indent the | to the first :
                           | (Numeric arg0) -> self
                           ^
gems/activesupport/6.0/activesupport.rbs:239:28: C: [Corrected] RBS/Layout/OverloadIndentation: Indent the | to the first :
                           | (Numeric arg0) -> self
                           ^
gems/activesupport/6.0/activesupport.rbs:384:1: C: [Corrected] RBS/Layout/IndentationWidth: Use 2 (not 4) spaces for indentation.
    def try: () { (untyped) -> untyped } -> nil
^^^^
gems/activesupport/6.0/activesupport.rbs:385:12: C: [Corrected] RBS/Layout/OverloadIndentation: Indent the | to the first :
           | () { () -> untyped } -> nil
           ^
gems/activesupport/6.0/activesupport.rbs:386:12: C: [Corrected] RBS/Layout/OverloadIndentation: Indent the | to the first :
           | (Object::name method_name, *untyped args) ?{ (*untyped) -> untyped } -> nil
           ^
gems/activesupport/6.0/activesupport.rbs:388:1: C: [Corrected] RBS/Layout/IndentationWidth: Use 2 (not 4) spaces for indentation.
    def try!: () { (untyped) -> untyped } -> nil
^^^^
gems/activesupport/6.0/activesupport.rbs:389:13: C: [Corrected] RBS/Layout/OverloadIndentation: Indent the | to the first :
            | () { () -> untyped } -> nil
            ^
gems/activesupport/6.0/activesupport.rbs:390:13: C: [Corrected] RBS/Layout/OverloadIndentation: Indent the | to the first :
            | (Object::name method_name, *untyped args) ?{ (*untyped) -> untyped } -> nil
            ^
gems/activesupport/6.0/activesupport.rbs:391:1: C: [Corrected] RBS/Layout/EmptyLinesAroundClassBody: Extra empty line detected at class body end.

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