opkg info from the unadulterated b1300 lent for the challenge claims that the
version of unum installed is v2-1, see below:
root@MINIM:~# opkg info unum
Package: unum
Version: v2-1
Depends: libc, libpthread, librt, libuci, jansson, libiwinfo, libcurl, libmbedtls
Status: install user installed
Architecture: arm_cortex-a7_neon-vfpv4