Add USING to the list of completion keywords.
Add USING to the list of completion keywords.

bitmonk/pgcli,MattOates/pgcli,thedrow/pgcli,dbcli/pgcli,j-bennet/pgcli,bitemyapp/pgcli,w4ngyi/pgcli,thedrow/pgcli,darikg/pgcli,MattOates/pgcli,suzukaze/pgcli,dbcli/vcli,joewalnes/pgcli,joewalnes/pgcli,johshoff/pgcli,lk1ngaa7/pgcli,yx91490/pgcli,zhiyuanshi/pgcli,TamasNo1/pgcli,yx91490/pgcli,suzukaze/pgcli,dbcli/pgcli,n-someya/pgcli,janusnic/pgcli,n-someya/pgcli,d33tah/pgcli,bitemyapp/pgcli,w4ngyi/pgcli,lk1ngaa7/pgcli,bitmonk/pgcli,koljonen/pgcli,dbcli/vcli,janusnic/pgcli,nosun/pgcli,nosun/pgcli,koljonen/pgcli,j-bennet/pgcli,TamasNo1/pgcli,darikg/pgcli,johshoff/pgcli,zhiyuanshi/pgcli,d33tah/pgcli