Upgrade node-pre-gyp to version 0.9.0

[SebastianSchmidt]

Closes #950

[SebastianSchmidt]

@springmeyer The OS X NODE_VERSION="5" COVERAGE=true PUBLISHABLE=false job failed. This error has already occurred before this pull request.

build/temp.macosx-10.12-intel-2.7/_openssl.c:493:10: fatal error: 'openssl/opensslv.h' file not found
#include <openssl/opensslv.h>
         ^
1 error generated.
error: Setup script exited with error: command 'cc' failed with exit status 1
The command "if [[ ${COVERAGE} == true ]]; then if [[ $(uname -s) == 'Linux' ]]; then PYTHONUSERBASE=$(pwd)/py-local pip install --user cpp-coveralls; else PYTHONUSERBASE=$(pwd)/py-local easy_install --user cpp-coveralls; fi; fi" failed and exited with 1 during .

[springmeyer]

Yes, that is safe to ignore/unrelated to your PR. Thanks for providing this, merging now.

[ronkorving]

Awesome fellas :)
Hoping to see a release on NPM soon :)