Update node library dependencies

ws@0.4.32 is really old and presents issues for users using modern versions of Node (see https://github.com/apache/thrift/pull/672#issuecomment-276678791). Its should be updated.

In the third pull request, here are the dependencies:

node-int64 ~0.4.0
q ~1.5.0
ws >= 2.2.3 which implies node >= 4.1.0 (https://github.com/websockets/ws/tree/2.2.3)

On the ubuntu-xenial image which uses node v8.4.0 and npm 5.3.0, and on the centos-7.3 image which uses node v6.11.1 and npm 3.10.10 you end up with the following packages:

root@ddb384ee75a5:/thrift/src/lib/nodejs# npm list --depth 0
thrift@1.0.0-dev /thrift/src
+-- buffer-equals@1.0.4
+-- commander@2.11.0
+-- connect@3.6.3
+-- istanbul@0.4.5
+-- minimatch@3.0.4
+-- node-int64@0.4.0
+-- phantomjs@2.1.7
+-- q@1.5.0
+-- run-browser@2.0.2
+-- tape@4.8.0
+-- utf-8-validate@3.0.3
`-- ws@3.1.0

Node updated to version 8.5 and when that happened the CI builds broke. Node 8.5, jsdoc, grunt-jsdoc, or something in that area has a backwards compatibility issue in copyFile handling. I have downgraded node to version 7 on the CI image for now.