bundle inject
Add the named gem(s), with version requirements, to the resolved Gemfile
$ bundle inject [GEM] [VERSION]
When injecting a gem, it adds it to both your Gemfile and Gemfile.lock if
it doesn't yet exist in them. Example below:
$ bundle install
$ bundle inject 'rack' '> 0'
# Injects rack gem greater than version 0 in your Gemfile and Gemfile.lock
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