mwan3: sync PKG_RELEASE number and PKG_VERSION with master

mwan3: sync PKG_RELEASE number and PKG_VERSION with master

Since the merge of the luci master branch into the luci openwrt.19.07 branch,
the ubus API was not in sync anymore. So all commits from the master
branch where backported into the openwrt-19.07 branch. But this could
not be done linear. There were already some fixes cherry-picked from the
master and the version does not match anymore. This commit syncronized
the PKG_VERSION and the PKG_RELEASE again to make clear that the
version in master and openwrt-19.07 are even again and have so the
same software version until to this commit.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>