update to pkg 1.3.7

[Zoran Kolic]

> There was an issue found which is resolved in 1.3.7
> pkg check -Ba is also needed to fix the db
> 
>      For binary package users:
>       # pkg install ports-mgmt/pkg
>       # pkg update -f
>       # pkg check -Ba
>       # pkg upgrade

Ah! I misunderstood check part! Thanks!
Do I need to use last command (pkg upgrade) if I
want to install anything, without upgrading whole
system?
Best regards

                        Zoran