Pin exact versions of @kartotherian/snapshot and @kartotherian/maki
Pin exact versions of @kartotherian/snapshot and @kartotherian/maki

These had new minor versions published for node-mapnik 3.7 perhaps a bit
prematurely. Let's pin these to the exact versions we need until we're
ready to upgrade.

nyurik/kartotherian,kartotherian/kartotherian,kartotherian/kartotherian,nyurik/kartotherian,kartotherian/kartotherian,kartotherian/kartotherian,nyurik/kartotherian,nyurik/kartotherian