update rubocop to 0.76 (#41)

* update rubocop to 76.0

* Travis-CI: Ruby 2.3 is EOL (not maintained), add Ruby 2.4,2.5,2.6

.rubocop.yml

@@ -12,7 +12,7 @@ Layout/CommentIndentation:
 Style/NestedModifier:
   Enabled: true
 
-Layout/IndentArray:
+Layout/IndentFirstArrayElement:
   Enabled: true
 
 Layout/AlignArray:
@@ -219,7 +219,11 @@ Layout/SpaceInsideParens:
   StyleGuide: https://github.com/backupify/backupify_styleguides/blob/master/RubyStyleguide.md#no-spaces-around-delimiters
   Enabled: true
 
-Layout/SpaceInsideBrackets:
+Layout/SpaceInsideArrayLiteralBrackets:
+  StyleGuide: https://github.com/backupify/backupify_styleguides/blob/master/RubyStyleguide.md#no-spaces-around-delimiters
+  Enabled: true
+
+Layout/SpaceInsideReferenceBrackets:
   StyleGuide: https://github.com/backupify/backupify_styleguides/blob/master/RubyStyleguide.md#no-spaces-around-delimiters
   Enabled: true
 
@@ -235,7 +239,7 @@ Layout/RescueEnsureAlignment:
   StyleGuide: https://github.com/backupify/backupify_styleguides/blob/master/RubyStyleguide.md#case-indentation
   Enabled: true
 
-Lint/EndAlignment:
+Layout/EndAlignment:
   StyleGuide: https://github.com/backupify/backupify_styleguides/blob/master/RubyStyleguide.md#case-indentation
   Enabled: true
   AutoCorrect: true
@@ -307,11 +311,11 @@ Layout/SpaceAfterMethodName:
   StyleGuide: https://github.com/backupify/backupify_styleguides/blob/master/RubyStyleguide.md#no-space-after-method-name
   Enabled: true
 
-Style/VariableName:
+Naming/VariableName:
   StyleGuide: https://github.com/backupify/backupify_styleguides/blob/master/RubyStyleguide.md#variable-names
   Enabled: true
 
-Style/ConstantName:
+Naming/ConstantName:
   StyleGuide: https://github.com/backupify/backupify_styleguides/blob/master/RubyStyleguide.md#constant-names
   Enabled: true
 

Gemfile

@@ -4,5 +4,5 @@ source 'https://rubygems.org'
 gemspec
 group :development, :test do
   gem "rspec"
-  gem "rubocop", "~> 0.49.0"
+  gem "rubocop", "~> 0.76.0"
 end

spec/kong/upstream_spec.rb

@@ -24,7 +24,7 @@
       expect(Kong::Client.instance)
         .to receive(:get).with("/upstreams/12345/targets")
         .and_return({
-          'data'  => [{ 'upstream_id' => 12345, 'target' => 'google.com:80', 'weight' => 100 }],
+          'data' => [{ 'upstream_id' => 12345, 'target' => 'google.com:80', 'weight' => 100 }],
           'total' => 1
         })