dep: lock rubocop and rubocop-shopify

backporting 1abad8e and 0753a8b

Author: flavorjones

nokogiri.gemspec

@@ -330,11 +330,11 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency("rake-compiler-dock", "= 1.2.2")
   spec.add_development_dependency("rdoc", "~> 6.3")
   spec.add_development_dependency("rexical", "~> 1.0.7")
-  spec.add_development_dependency("rubocop", "~> 1.28", ">= 1.28.2")
+  spec.add_development_dependency("rubocop", "~> 1.30.1")
   spec.add_development_dependency("rubocop-minitest", "~> 0.17")
   spec.add_development_dependency("rubocop-performance", "~> 1.12")
   spec.add_development_dependency("rubocop-rake", "~> 0.6")
-  spec.add_development_dependency("rubocop-shopify", "~> 2.3")
+  spec.add_development_dependency("rubocop-shopify", "= 2.5.0")
   spec.add_development_dependency("ruby_memcheck", "~> 1.0")
   spec.add_development_dependency("simplecov", "~> 0.21")