Update esc to version 0.2.0 / rev 2 via SR 896967
https://build.opensuse.org/request/show/896967
by user RBrownSUSE + dimstar_suse
- Build with go 1.15 to fix build issues
(Upstream expected to add go1.16 in future versions) (forwarded request 896966 from RBrownSUSE)