Bug#904994: gjs: New upstream release 1.53.90, requiring mozjs60

[Simon McVittie]

Package: gjs
Version: 1.52.3-2
Severity: wishlist
Control: block -1 by 904991

gjs 1.53.90 requires mozjs60, so cannot be packaged immediately. Filing a
bug to record that dependency.

    smcv