mox-otp: Update to version 0.3

This is a backport from develop branch. If someone is using newer kernel than 4.14, the post install script of Foris fails. It requires a new version of mox-otp, which has support for it.

INFO:Running postinst of foris
Traceback (most recent call last):
  File "/usr/bin/mox-otp", line 11, in <module>
    load_entry_point('mox-otp==0.2', 'console_scripts', 'mox-otp')()
  File "/usr/lib/python3.7/site-packages/mox_otp/__main__.py", line 86, in main
  File "/usr/lib/python3.7/site-packages/mox_otp/argparser.py", line 80, in parse_args
AttributeError: 'NoneType' object has no attribute 'buffer'
crypto-wrapper: error: Failed to run command 'mox-otp serial-number'

Reported-by: @prohar

hardware/mox/mox-otp/Makefile

 #
-## Copyright (C) 2019 CZ.NIC z.s.p.o. (http://www.nic.cz/)
+## Copyright (C) 2019-2020 CZ.NIC z.s.p.o. (https://www.nic.cz/)
 #
 ## This is free software, licensed under the GNU General Public License v3.
 # See /LICENSE for more information.
@@ -8,8 +8,8 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mox-otp
-PKG_VERSION:=0.2.1
-PKG_RELEASE:=2
+PKG_VERSION:=0.3
+PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://gitlab.nic.cz/turris/mox-otp.git