Bug#918292: node-sshpk build depends on node-temp that is currently not in buster

[Adrian Bunk]

Source: node-sshpk
Version: 1.13.1+dfsg-1
Severity: serious
Tags: ftbfs
Control: block -1 by 834915

node-sshpk build depends on node-temp that is currently
not in buster due to #834915.