Merge pull request #34 from DavidOsipov/renovate/tzinfo-2.x

Update dependency tzinfo to v2

Author: DavidOsipov

site/Gemfile

@@ -10,7 +10,7 @@ gem "jekyll-include-cache", "~> 0.2.1" # Optional: Improves build performance
 # Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
 # and associated library.
 platforms :mingw, :x64_mingw, :mswin, :jruby do
-  gem "tzinfo", "~> 1.2"
+  gem "tzinfo", "~> 2.0"
   gem "tzinfo-data"
 end