Make internal constants private

Author: sferik

lib/multi_json/adapters/json_common.rb

@@ -11,6 +11,7 @@ class JsonCommon < Adapter
         object_nl: "\n",
         array_nl: "\n"
       }.freeze
+      private_constant :PRETTY_STATE_PROTOTYPE
 
       def load(string, options = {})
         string = string.dup.force_encoding(::Encoding::ASCII_8BIT) if string.respond_to?(:force_encoding)

lib/multi_json/adapters/oj.rb

@@ -17,6 +17,7 @@ class Oj < Adapter
       # (at least for now).
       class ParseError < ::SyntaxError
         WRAPPED_CLASSES = %w[Oj::ParseError JSON::ParserError].to_set.freeze
+        private_constant :WRAPPED_CLASSES
 
         def self.===(exception)
           case exception
@@ -36,6 +37,7 @@ def load(string, options = {})
       OJ_VERSION = ::Oj::VERSION
       OJ_V2 = OJ_VERSION.start_with?("2.")
       OJ_V3 = OJ_VERSION.start_with?("3.")
+      private_constant :OJ_VERSION, :OJ_V2, :OJ_V3
 
       if OJ_V3
         PRETTY_STATE_PROTOTYPE = {
@@ -46,6 +48,7 @@ def load(string, options = {})
           array_nl: "\n",
           ascii_only: false
         }.freeze
+        private_constant :PRETTY_STATE_PROTOTYPE
       end
 
       def dump(object, options = {})

lib/multi_json/convertible_hash_keys.rb

@@ -1,6 +1,7 @@
 module MultiJson
   module ConvertibleHashKeys
     SIMPLE_OBJECT_CLASSES = [String, Numeric, TrueClass, FalseClass, NilClass].freeze
+    private_constant :SIMPLE_OBJECT_CLASSES
 
     private