Bump version to json-2.4.1 and use VERSION file for json version same as upstream

ext/json/VERSION

@@ -0,0 +1 @@
+2.4.1

ext/json/json.gemspec

@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |s|
   s.name = "json"
-  s.version = "2.4.0"
+  s.version = File.read('VERSION').chomp
 
   s.summary = "JSON Implementation for Ruby"
   s.description = "This is a JSON implementation as a Ruby extension in C."
@@ -12,18 +12,13 @@ Gem::Specification.new do |s|
 
   s.extensions = ["ext/json/ext/generator/extconf.rb", "ext/json/ext/parser/extconf.rb", "ext/json/extconf.rb"]
   s.extra_rdoc_files = ["README.md"]
-  s.rdoc_options = ["--title", "JSON implemention for Ruby", "--main", "README.md"]
+  s.rdoc_options = ["--title", "JSON implementation for Ruby", "--main", "README.md"]
   s.files = [
-    ".gitignore",
-    ".travis.yml",
     "CHANGES.md",
     "Gemfile",
     "LICENSE",
-    "README-json-jruby.md",
     "README.md",
-    "Rakefile",
     "VERSION",
-    "diagrams/.keep",
     "ext/json/ext/fbuffer/fbuffer.h",
     "ext/json/ext/generator/depend",
     "ext/json/ext/generator/extconf.rb",
@@ -35,23 +30,7 @@ Gem::Specification.new do |s|
     "ext/json/ext/parser/parser.h",
     "ext/json/ext/parser/parser.rl",
     "ext/json/extconf.rb",
-    "install.rb",
-    "java/src/json/ext/ByteListTranscoder.java",
-    "java/src/json/ext/Generator.java",
-    "java/src/json/ext/GeneratorMethods.java",
-    "java/src/json/ext/GeneratorService.java",
-    "java/src/json/ext/GeneratorState.java",
-    "java/src/json/ext/OptionsReader.java",
-    "java/src/json/ext/Parser.java",
-    "java/src/json/ext/Parser.rl",
-    "java/src/json/ext/ParserService.java",
-    "java/src/json/ext/RuntimeInfo.java",
-    "java/src/json/ext/StringDecoder.java",
-    "java/src/json/ext/StringEncoder.java",
-    "java/src/json/ext/Utils.java",
-    "json-java.gemspec",
     "json.gemspec",
-    "json_pure.gemspec",
     "lib/json.rb",
     "lib/json/add/bigdecimal.rb",
     "lib/json/add/complex.rb",
@@ -75,53 +54,7 @@ Gem::Specification.new do |s|
     "lib/json/pure/generator.rb",
     "lib/json/pure/parser.rb",
     "lib/json/version.rb",
-    "references/rfc7159.txt",
-    "tests/fixtures/fail10.json",
-    "tests/fixtures/fail11.json",
-    "tests/fixtures/fail12.json",
-    "tests/fixtures/fail13.json",
-    "tests/fixtures/fail14.json",
-    "tests/fixtures/fail18.json",
-    "tests/fixtures/fail19.json",
-    "tests/fixtures/fail2.json",
-    "tests/fixtures/fail20.json",
-    "tests/fixtures/fail21.json",
-    "tests/fixtures/fail22.json",
-    "tests/fixtures/fail23.json",
-    "tests/fixtures/fail24.json",
-    "tests/fixtures/fail25.json",
-    "tests/fixtures/fail27.json",
-    "tests/fixtures/fail28.json",
-    "tests/fixtures/fail3.json",
-    "tests/fixtures/fail4.json",
-    "tests/fixtures/fail5.json",
-    "tests/fixtures/fail6.json",
-    "tests/fixtures/fail7.json",
-    "tests/fixtures/fail8.json",
-    "tests/fixtures/fail9.json",
-    "tests/fixtures/obsolete_fail1.json",
-    "tests/fixtures/pass1.json",
-    "tests/fixtures/pass15.json",
-    "tests/fixtures/pass16.json",
-    "tests/fixtures/pass17.json",
-    "tests/fixtures/pass2.json",
-    "tests/fixtures/pass26.json",
-    "tests/fixtures/pass3.json",
-    "tests/json_addition_test.rb",
-    "tests/json_common_interface_test.rb",
-    "tests/json_encoding_test.rb",
-    "tests/json_ext_parser_test.rb",
-    "tests/json_fixtures_test.rb",
-    "tests/json_generator_test.rb",
-    "tests/json_generic_object_test.rb",
-    "tests/json_parser_test.rb",
-    "tests/json_string_matching_test.rb",
-    "tests/test_helper.rb",
-    "tests/test_helper.rb",
-    "tools/diff.sh",
-    "tools/fuzz.rb",
-    "tools/server.rb",
-  ]
+  ] + Dir["tests/**/*"]
   s.homepage = "http://flori.github.com/json"
   s.metadata = {
     'bug_tracker_uri'   => 'https://github.com/flori/json/issues',
@@ -135,6 +68,6 @@ Gem::Specification.new do |s|
   s.required_ruby_version = Gem::Requirement.new(">= 2.0")
   s.test_files = ["tests/test_helper.rb"]
 
-  s.add_development_dependency("rake", [">= 0"])
-  s.add_development_dependency("test-unit", [">= 2.0", "< 4.0"])
+  s.add_development_dependency "rake"
+  s.add_development_dependency "test-unit"
 end

ext/json/lib/json/version.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: false
 module JSON
   # JSON version
-  VERSION         = '2.3.1'
+  VERSION         = '2.4.1'
   VERSION_ARRAY   = VERSION.split(/\./).map { |x| x.to_i } # :nodoc:
   VERSION_MAJOR   = VERSION_ARRAY[0] # :nodoc:
   VERSION_MINOR   = VERSION_ARRAY[1] # :nodoc:

tool/sync_default_gems.rb

@@ -121,6 +121,7 @@ def sync_default_gems(gem)
     cp_r("#{upstream}/tests", "test/json")
     cp_r("#{upstream}/lib", "ext/json")
     cp_r("#{upstream}/json.gemspec", "ext/json")
+    cp_r("#{upstream}/VERSION", "ext/json")
     rm_rf(%w[ext/json/lib/json/ext ext/json/lib/json/pure.rb ext/json/lib/json/pure])
     `git checkout ext/json/extconf.rb ext/json/parser/prereq.mk ext/json/generator/depend ext/json/parser/depend ext/json/depend`
   when "psych"