Ruby update and Bundler error
Update Ruby
$ ruby -v
$ curl -L https://get.rvm.io | bash -s stable
To start using RVM you need to run: `$ source /Users/feng/.rvm/scripts/rvm`
$ rvm install ruby-[version] or rvm install ruby-2.4.1
$ rvm use ruby-2.4.1
or set as deafult:$ rvm --default use 2.4.1
Error:
You must use Bundler 2 or greater with this lockfile.
Fix
$ gem install bundler
$ bundle install