我尝试更新 Jekyll，但现在遇到了问题。幸运的是，我仍然可以使用 构建我的网站bundle exec jekyll serve，但是当我运行时，jekyll serve我得到以下信息：
Traceback (most recent call last):
10: from /Users/jon.graft/.rbenv/versions/2.6.3/bin/jekyll:23:in `<main>'
9: from /Users/jon.graft/.rbenv/versions/2.6.3/bin/jekyll:23:in `load'
8: from /Users/jon.graft/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/jekyll-4.0.0/exe/jekyll:11:in `<top (required)>'
7: from /Users/jon.graft/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/jekyll-4.0.0/lib/jekyll/plugin_manager.rb:52:in `require_from_bundler'
6: from /Users/jon.graft/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/bundler-2.0.2/lib/bundler.rb:107:in `setup'
5: from /Users/jon.graft/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/bundler-2.0.2/lib/bundler/runtime.rb:26:in `setup'
4: from /Users/jon.graft/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/bundler-2.0.2/lib/bundler/runtime.rb:26:in `map'
3: from /Users/jon.graft/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/bundler-2.0.2/lib/bundler/spec_set.rb:148:in `each'
2: from /Users/jon.graft/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/bundler-2.0.2/lib/bundler/spec_set.rb:148:in `each'
1: from /Users/jon.graft/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/bundler-2.0.2/lib/bundler/runtime.rb:31:in `block in setup'
/Users/jon.graft/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/bundler-2.0.2/lib/bundler/runtime.rb:319:in `check_for_activated_spec!': You have already activated i18n 1.6.0, but your Gemfile requires i18n 0.9.5. Prepending `bundle exec` to your command may …