jo: update to 1.3.

ChangeLog:

2019-11-04 1.3
- FIX: Escaped @ ("\@") is treated as "@" (#42, #103)
- NEW: Support reading JSON array elements (#91)
- UPD: Add home and removable-media interfaces to snap (#94)
- FIX: fix unlikely crash after malloc fail when base64 encoding.
- NEW: Support reading nested data from pipes (#82)

(fcambus)