chore: pin mmap-io to 1.0.0

[gcampax]

mmap-io 1.1.0 is busted, see ozra/mmap-io#17

[ozra]

Sorry I didn't see the notifications earlier. Bumped to 1.1.3 today with the C++ portion caught up with the breaking changes in Nan/V8/Node 12.x, if you want to try it out. Builds passed on Linux and Mac, node 10.16.0 (LTS) and node 12.6.0 (latest).

[gcampax]

Hey, thanks for weighing in on this. I'm afraid 1.1.3 is still problematic, because the JS code still refers to the build .node file in the wrong location: https://travis-ci.com/stanford-oval/genie-toolkit/builds/118500925

[ozra]

Try your luck with 1.1.6 — I added it to a fresh proj and it worked — after several very silly mistakes.
It doesn't refer to the wrong place — it points to a js-wrapper-module that includes the .node module in turn. It just so happened that the js-files vanished before reaching end-user installment xD Really stupid mistake. It's all in the changelog for the curious.