[MacPorts] #34705: npm: add bash-completion

[MacPorts]

#34705: npm: add bash-completion
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 Reporter:  robsonpeixoto@…          |       Owner:  macports-tickets@…                   
     Type:  enhancement              |      Status:  new                                  
 Priority:  Normal                   |   Milestone:                                       
Component:  ports                    |     Version:                                       
 Keywords:  haspatch                 |        Port:  npm                                  
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 Add the variant bash_completion

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Ticket URL: <https://trac.macports.org/ticket/34705>
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