register email obfuscator in gem

Gemfile

@@ -27,6 +27,9 @@ group :jekyll_plugins do
  gem "jekyll-feed",
      "~> 0.6"
 
+ gem 'jekyll-email-protect',
+     "~> 1.1"
+
  gem 'jekyll-theme-lcsb-frozen-components',
      '~> 0.0.2',
      :git => "https://git-r3lab.uni.lu/core-services/jekyll-theme-lcsb-frozen-components.git",