Upgrade RuboCop to the latest version

Author: mshibuya

.github/workflows/test.yml

@@ -110,7 +110,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7
+          ruby-version: 3.0
       - name: Cache gems
         uses: actions/cache@v2
         with:

.rubocop.yml

@@ -9,15 +9,87 @@ AllCops:
     - 'vendor/bundle/**/*'
   TargetRubyVersion: 2.5
 
+Gemspec/DateAssignment:
+  Enabled: true
+
 Layout/AccessModifierIndentation:
   EnforcedStyle: outdent
 
 Layout/DotPosition:
   EnforcedStyle: trailing
 
+Layout/LineEndStringConcatenationIndentation:
+  Enabled: true
+
+Layout/LineLength:
+  AllowURI: true
+  Enabled: false
+
+Layout/SpaceBeforeBrackets:
+  Enabled: true
+
 Layout/SpaceInsideHashLiteralBraces:
   EnforcedStyle: no_space
 
+Lint/AmbiguousAssignment:
+  Enabled: true
+
+Lint/AmbiguousRange:
+  Enabled: true
+
+Lint/DeprecatedConstants:
+  Enabled: true
+
+Lint/DuplicateBranch:
+  Enabled: true
+  IgnoreLiteralBranches: true
+
+Lint/DuplicateRegexpCharacterClassElement:
+  Enabled: true
+
+Lint/EmptyBlock:
+  Enabled: true
+  Exclude:
+    - 'spec/**/*'
+
+Lint/EmptyClass:
+  Enabled: true
+  Exclude:
+    - 'spec/**/*'
+
+Lint/EmptyInPattern:
+  Enabled: true
+
+Lint/LambdaWithoutLiteralBlock:
+  Enabled: true
+
+Lint/NoReturnInBeginEndBlocks:
+  Enabled: true
+
+Lint/NumberedParameterAssignment:
+  Enabled: true
+
+Lint/OrAssignmentToConstant:
+  Enabled: true
+
+Lint/RedundantDirGlobSort:
+  Enabled: true
+
+Lint/SymbolConversion:
+  Enabled: true
+
+Lint/ToEnumArguments:
+  Enabled: true
+
+Lint/TripleQuotes:
+  Enabled: true
+
+Lint/UnexpectedBlockArity:
+  Enabled: true
+
+Lint/UnmodifiedReduceAccumulator:
+  Enabled: true
+
 Metrics/AbcSize:
   Max: 69.98 # TODO: Lower to 15
 
@@ -29,11 +101,7 @@ Metrics/ClassLength:
   Max: 120 # TODO: Lower to 100
 
 Metrics/CyclomaticComplexity:
-  Max: 12 # TODO: Lower to 6
-
-Metrics/LineLength:
-  AllowURI: true
-  Enabled: false
+  Max: 15 # TODO: Lower to 6
 
 Metrics/MethodLength:
   CountComments: false
@@ -47,15 +115,24 @@ Metrics/ParameterLists:
   CountKeywordArgs: true
 
 Metrics/PerceivedComplexity:
-  Max: 14 # TODO: Lower to 7
+  Max: 17 # TODO: Lower to 7
 
 Naming/FileName:
   Exclude:
     - 'lib/rails_admin/bootstrap-sass.rb'
 
+Naming/InclusiveLanguage:
+  Enabled: true
+
 Style/Alias:
   Enabled: false
 
+Style/ArgumentsForwarding:
+  Enabled: true
+
+Style/CollectionCompact:
+  Enabled: true
+
 Style/CollectionMethods:
   PreferredMethods:
     map:      'collect'
@@ -66,6 +143,9 @@ Style/CollectionMethods:
 Style/Documentation:
   Enabled: false
 
+Style/DocumentDynamicEvalDefinition:
+  Enabled: false
+
 Style/DoubleNegation:
   Enabled: false
 
@@ -75,18 +155,57 @@ Style/EachWithObject:
 Style/Encoding:
   Enabled: false
 
+Style/EndlessMethod:
+  Enabled: true
+
 Style/FrozenStringLiteralComment:
   Enabled: false
 
+Style/HashConversion:
+  Enabled: true
+
+Style/HashExcept:
+  Enabled: true
+
+Style/IfWithBooleanLiteralBranches:
+  Enabled: true
+
+Style/InPatternThen:
+  Enabled: true
+
 Style/Lambda:
   Enabled: false
 
+Style/MultilineInPatternThen:
+  Enabled: true
+
+Style/NegatedIfElseCondition:
+  Enabled: true
+
 Style/NumericPredicate:
   Enabled: false
 
+Style/NilLambda:
+  Enabled: true
+
+Style/QuotedSymbols:
+  Enabled: true
+
 Style/RaiseArgs:
   EnforcedStyle: compact
 
+Style/RedundantArgument:
+  Enabled: true
+
+Style/RedundantSelfAssignmentBranch:
+  Enabled: true
+
+Style/StringChars:
+  Enabled: true
+
+Style/SwapValues:
+  Enabled: true
+
 Style/TrailingCommaInArguments:
   EnforcedStyleForMultiline: 'comma'