Bump rubocop

And update config for new/updated cops.

.rubocop.yml

@@ -25,6 +25,15 @@ Metrics/ModuleLength:
 Metrics/AbcSize:
   Max: 20
 
+# Some blocks are longer.
+Metrics/BlockLength:
+  ExcludedMethods:
+    - "namespace"
+    - "create_table"
+  Exclude:
+    - "config/**/*.rb"
+    - "spec/**/*.rb"
+
 # No space makes the method definition shorter and differentiates
 # from a regular assignment.
 Style/SpaceAroundEqualsInParameterDefault:
@@ -51,7 +60,7 @@ Style/HashSyntax:
  EnforcedStyle: ruby19_no_mixed_keys
 
 # has_key? and has_value? are far more readable than key? and value?
-Style/DeprecatedHashMethods:
+Style/PreferredHashMethods:
   Enabled: false
 
 # String#% is by far the least verbose and only object oriented variant.
@@ -147,7 +156,20 @@ Style/OpMethod:
 Lint/Debugger:
   Enabled: false
 
+# We used comparison everywhere.
+Style/NumericPredicate:
+  EnforcedStyle: comparison
 
 # Reset some HoundCI changes back to Rubocop defaults
 Style/DotPosition:
   EnforcedStyle: leading
+
+### backward compatibility
+
+# only with ruby >= 2.3
+Style/FrozenStringLiteralComment:
+  Enabled: false
+
+# only with ruby >= 2.4
+Performance/RegexpMatch:
+  Enabled: false

Gemfile

@@ -244,7 +244,7 @@ group :development do
   gem "rb-inotify",     "0.9.8", require: false
 
   # Linters
-  gem "rubocop",        "0.40.0"
+  gem "rubocop",        "0.47.1"
   gem "haml_lint",      "0.18.2"
   gem "pronto",         "0.8.2"
   gem "pronto-eslint",  "0.8.0"

Gemfile.lock

@@ -628,8 +628,8 @@ GEM
       rspec-mocks (~> 3.5.0)
       rspec-support (~> 3.5.0)
     rspec-support (3.5.0)
-    rubocop (0.40.0)
-      parser (>= 2.3.1.0, < 3.0)
+    rubocop (0.47.1)
+      parser (>= 2.3.3.1, < 3.0)
       powerpack (~> 0.1)
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.7)
@@ -898,7 +898,7 @@ DEPENDENCIES
   redcarpet (= 3.4.0)
   responders (= 2.3.0)
   rspec-rails (= 3.5.2)
-  rubocop (= 0.40.0)
+  rubocop (= 0.47.1)
   ruby-oembed (= 0.10.1)
   rubyzip (= 1.2.1)
   sass-rails (= 5.0.6)

lib/node_info.rb

@@ -6,6 +6,7 @@ module NodeInfo
   SCHEMAS = {}
   private_constant :VERSIONS, :SCHEMAS
 
+  # rubocop:disable Metrics/BlockLength
   Document = Struct.new(:version, :software, :protocols, :services, :open_registrations, :usage, :metadata) do
     Software = Struct.new(:name, :version) do
       def initialize(name=nil, version=nil)
@@ -132,6 +133,7 @@ module NodeInfo
       end
     end
   end
+  # rubocop:enable Metrics/BlockLength
 
   def self.schema(version)
     SCHEMAS[version] ||= JSON.parse(