Rubocop: Update 1.28.2->1.50.0; requires Ruby 2.6

rubocop.yml

@@ -5,8 +5,8 @@ require:
   - rubocop-rake
 
 AllCops:
-  # Puppet agent 6 ships with ruby 2.5.  Puppetserver 6 uses JRuby 9.2.x (Ruby 2.5 compatible) since version 6.1.0.
-  TargetRubyVersion: 2.5
+  # Puppetserver 7 uses Jruby 9.3 which is compatible to C Ruby 2.6
+  TargetRubyVersion: 2.6
   Include:
     - '**/*.rb'
   Exclude:
@@ -567,8 +567,6 @@ Naming/MethodParameterName:
   AllowedNames: ['at', 'by', 'to', 'db', 'id', 'in', 'io', 'ip', 'of', 'on', 'os', 'pp', 'is']
 
 # New cops available after rubocop upgrade
-Gemspec/DateAssignment: # (new in 1.10)
-  Enabled: true
 Lint/AmbiguousAssignment: # (new in 1.7)
   Enabled: true
 Lint/DeprecatedConstants: # (new in 1.8)
@@ -665,3 +663,7 @@ RSpec/Rails/AvoidSetupHook: # new in 2.4
   Enabled: true
 RSpec/ImplicitSubject:
   Enabled: false
+# new configurations since rubocop 1.50.0
+RSpec/NoExpectationExample:
+  Exclude:
+    - 'spec/acceptance/'

voxpupuli-test.gemspec

@@ -31,9 +31,10 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'rspec-puppet-utils', '~> 3.4'
 
   # Rubocop
-  # newest versions that still support Ruby 2.5
-  s.add_runtime_dependency 'rubocop', '~> 1.28.2'
-  s.add_runtime_dependency 'rubocop-rspec', '~> 2.10.0'
+  # newest versions that still support Ruby 2.6
+  # jruby 9.3 in Puppetserver 7 is compatible with C Ruby 2.6
+  s.add_runtime_dependency 'rubocop', '~> 1.50.0'
+  s.add_runtime_dependency 'rubocop-rspec', '~> 2.20.0'
   s.add_runtime_dependency 'rubocop-rake', '~> 0.6.0'
 
   # Linting