Fails to build for Node v10.14.1

Nobody has claimed this yet.

Tried to move my project to Node v10 and abaculus barks:

```
$ npm i @mapbox/abaculus

> mapnik@3.7.2 install /tmp/mapnik/node_modules/@mapbox/abaculus/node_modules/mapnik
> node-pre-gyp install --fallback-to-build

node-pre-gyp ERR! Tried to download(403): https://mapbox-node-binary.s3.amazonaws.com/mapnik/v3.7.2/node-v64-linux-x64-Release.tar.gz
node-pre-gyp ERR! Pre-built binaries not found for mapnik@3.7.2 and node@10.14.1 (node-v64 ABI, glibc) (falling back to source compile with node-gyp)
node-pre-gyp ERR! Tried to download(undefined): https://mapbox-node-binary.s3.amazonaws.com/mapnik/v3.7.2/node-v64-linux-x64-Release.tar.gz
node-pre-gyp ERR! Pre-built binaries not found for mapnik@3.7.2 and node@10.14.1 (node-v64 ABI, glibc) (falling back to source compile with node-gyp)
make: Entering directory '/tmp/mapnik/node_modules/@mapbox/abaculus/node_modules/mapnik/build'

[...snip building...]

../../nan/nan_object_wrap.h:66:61: required from here
/home/flc/.node-gyp/10.14.1/include/node/v8.h:9502:16: warning: cast between incompatible function types from ‘v8::WeakCallbackInfo::Callback’ {aka ‘void (*)(const v8::WeakCallbackInfo&)’} to ‘Callback’ {aka ‘void (*)(const v8::WeakCallbackInfo&)’} [-Wcast-function-type]
CXX(target) Release/obj.target/mapnik/src/node_mapnik.o
sed: can't read ./Release/.deps/Release/obj.target/mapnik/src/mapnik_logger.o.d.raw: No such file or directory
make: *** [mapnik.target.mk:237: Release/obj.target/mapnik/src/mapnik_logger.o] Error 2
make: Leaving directory '/tmp/mapnik/node_modules/@mapbox/abaculus/node_modules/mapnik/build'
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack at ChildProcess.onExit (/home/flc/.nvm/versions/node/v10.14.1/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:262:23)
gyp ERR! stack at ChildProcess.emit (events.js:182:13)
gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:240:12)
gyp ERR! System Linux 4.19.4-arch1-1-ARCH
gyp ERR! command "/home/flc/.nvm/versions/node/v10.14.1/bin/node" "/home/flc/.nvm/versions/node/v10.14.1/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "build" "--fallback-to-build" "--module=/tmp/mapnik/node_modules/@mapbox/abaculus/node_modules/mapnik/lib/binding/mapnik.node" "--module_name=mapnik" "--module_path=/tmp/mapnik/node_modules/@mapbox/abaculus/node_modules/mapnik/lib/binding"
gyp ERR! cwd /tmp/mapnik/node_modules/@mapbox/abaculus/node_modules/mapnik
gyp ERR! node -v v10.14.1
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
node-pre-gyp ERR! build error
node-pre-gyp ERR! stack Error: Failed to execute '/home/flc/.nvm/versions/node/v10.14.1/bin/node /home/flc/.nvm/versions/node/v10.14.1/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js build --fallback-to-build --module=/tmp/mapnik/node_modules/@mapbox/abaculus/node_modules/mapnik/lib/binding/mapnik.node --module_name=mapnik --module_path=/tmp/mapnik/node_modules/@mapbox/abaculus/node_modules/mapnik/lib/binding' (1)
```

I see the README.md has the `build failing` icon, so maybe you were already aware.

Also I tried installing mapnik under Node v10 and went without problems.

Any ideas on how to fix this?

Reproduce `npm i @mapbox/abaculus` with Node v10.14.1 and inspect the `mapnik` install output, especially the node-pre-gyp fallback and node-gyp failure. Compare this with the reported successful direct mapnik installation; done means the abaculus dependency installs successfully on Node v10 without the logged build error.

Written by the indexing model from the issue text.