gnu: ruby-nokogiri: Update to 1.15.2.

* gnu/packages/ruby.scm (ruby-nokogiri): Update to 1.15.2.
  [source]<uri>: Use Git repository.
  <patches>: apply a patch to disable unneeded test setups.
  [arguments]: Enable check by running plain minitest.
  [home-page]: Update to current URL.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/patches/ruby-nokogiri.patch

@@ -0,0 +1,29 @@
+Description: Removed some unnecessary test setup such as SimpleCov and
+  minitest-reporters.
+diff --git a/test/helper.rb b/test/helper.rb
+index ed3133c6..4f5d4f1b 100644
+--- a/test/helper.rb
++++ b/test/helper.rb
+@@ -13,22 +13,10 @@
+ # - NOKOGIRI_GC: read more in test/test_memory_leak.rb
+ #
+ 
+-require "simplecov"
+-SimpleCov.start do
+-  add_filter "/test/"
+-  enable_coverage :branch
+-end
+-
+ $VERBOSE = true
+ 
+ require "minitest/autorun"
+ require "minitest/benchmark"
+-require "minitest/reporters"
+-
+-nokogiri_minitest_reporters_options = { color: true, slow_count: 10, detailed_skip: false }
+-nokogiri_minitest_reporters_options[:fast_fail] = true if ENV["NOKOGIRI_TEST_FAIL_FAST"]
+-puts "Minitest::Reporters options: #{nokogiri_minitest_reporters_options}"
+-Minitest::Reporters.use!(Minitest::Reporters::DefaultReporter.new(nokogiri_minitest_reporters_options))
+ 
+ require "fileutils"
+ require "tempfile"