Update package.json

Update package.json

Update package.json

v0.18.7

* Fix AppVeyor builds on old Node versions

* Try installing npm first

* Try installing node last

* Lock down node-pre-gyp version for older Node versions

* Log NPM version after install

* Try older NPM version

* Put things back in order

* Use `after_test` instead of `before_deploy`

* v0.18.7

Merge pull request libxmljs#473 from rchipka/master

Fix macOS build

Merge pull request libxmljs#470 from rchipka/master

Add linux/macOS precompiled binary support

Merge pull request libxmljs#453 from rchipka/master

v0.18.4