GitHub is HTTPS by default (brianmario#922)

Author: amatsuda

mysql2.gemspec

@@ -7,7 +7,7 @@ Mysql2::GEMSPEC = Gem::Specification.new do |s|
   s.license = "MIT"
   s.email = ['[email protected]', '[email protected]']
   s.extensions = ["ext/mysql2/extconf.rb"]
-  s.homepage = 'http://github.com/brianmario/mysql2'
+  s.homepage = 'https://github.com/brianmario/mysql2'
   s.rdoc_options = ["--charset=UTF-8"]
   s.summary = 'A simple, fast Mysql library for Ruby, binding to libmysql'
   s.required_ruby_version = '>= 2.0.0'