Add .rubocop.yml

.gitignore

@@ -13,6 +13,4 @@
 *.o
 *.a
 mkmf.log
-.rubocop.yml
-.rubocop_todo.yml
 

.rubocop.yml

@@ -0,0 +1,95 @@
+# this file is managed by dry-rb/devtools project
+
+AllCops:
+  TargetRubyVersion: 2.4
+
+Style/EachWithObject:
+  Enabled: false
+
+Style/StringLiterals:
+  Enabled: true
+  EnforcedStyle: single_quotes
+
+Style/Alias:
+  Enabled: false
+
+Style/LambdaCall:
+  Enabled: false
+
+Style/StabbyLambdaParentheses:
+  Enabled: false
+
+Style/FormatString:
+  Enabled: false
+
+Style/Documentation:
+  Enabled: false
+
+Layout/SpaceInLambdaLiteral:
+  Enabled: false
+
+Layout/MultilineMethodCallIndentation:
+  Enabled: true
+  EnforcedStyle: indented
+
+Metrics/LineLength:
+  Max: 100
+
+Metrics/MethodLength:
+  Max: 22
+
+Metrics/ClassLength:
+  Max: 150
+
+Metrics/AbcSize:
+  Max: 20
+
+Metrics/BlockLength:
+  Enabled: false
+
+Metrics/CyclomaticComplexity:
+  Enabled: true
+  Max: 10
+
+Lint/BooleanSymbol:
+  Enabled: false
+
+Style/AccessModifierDeclarations:
+  Enabled: false
+
+Style/BlockDelimiters:
+  Enabled: false
+
+Layout/IndentFirstArrayElement:
+  EnforcedStyle: consistent
+
+Style/ClassAndModuleChildren:
+  Exclude:
+    - "spec/**/*_spec.rb"
+
+Lint/HandleExceptions:
+  Exclude:
+    - "spec/spec_helper.rb"
+
+Naming/FileName:
+  Exclude:
+    - "lib/dry-*.rb"
+
+Style/SymbolArray:
+  Exclude:
+    - "spec/**/*_spec.rb"
+
+Style/ConditionalAssignment:
+  Enabled: false
+
+Naming/MethodName:
+  Enabled: false
+
+Style/AsciiComments:
+  Enabled: false
+
+Style/DateTime:
+  Enabled: false
+
+Style/IfUnlessModifier:
+  Enabled: false