Upgrade dependencies for rails 5

Author: echarp

html-pipeline-linuxfr.gemspec

@@ -18,9 +18,9 @@ Gem::Specification.new do |gem|
   gem.add_dependency "nokogiri",        "~> 1.6"
   gem.add_dependency "redcarpet",       "~> 3.4"
   gem.add_dependency "pygments.rb",     "~> 1.1"
-  gem.add_dependency "sanitize",        "~> 4.0"
+  gem.add_dependency "sanitize",        "~> 5.0"
   gem.add_dependency "escape_utils",    "~> 1.2"
-  gem.add_dependency "activesupport",   "~> 5.0"
+  gem.add_dependency "activesupport",   "~> 6.0"
   gem.add_dependency "patron",          "~> 0.8"
 
   gem.add_development_dependency "test-unit"