Bump bootsnap to avoid the error on require 'bootsnap/setup'

$ bin/rails test
/Users/prathamesh/Projects/sources/codetriage/config/boot.rb:4:in `require': cannot load such file -- bootsnap/setup (LoadError)
	from /Users/prathamesh/Projects/sources/codetriage/config/boot.rb:4:in `<top (required)>'
	from bin/rails:3:in `require_relative'
	from bin/rails:3:in `<main>'

- Rails uses bootstanp greater than 1.1.0 ~ rails/rails#29313

Gemfile

@@ -114,4 +114,5 @@ gem 'skylight'
 
 gem 'minitest', '5.10.3'
 gem 'sitemap_generator'
+
 gem 'premailer-rails'