node-gyp is not executable

[scottfwalter]

After running mvn com.github.eirslett:frontend-maven-plugin:install-node-and-npm

I noticed that node-gyp is not executable on both macOS and Linux using 1.6

❯ ls -l node/node_modules/npm/bin/node-gyp-bin
total 8
-rw-r--r-- 1 scott staff 172 Nov 8 15:07 node-gyp
-rw-r--r-- 1 scott staff 144 Nov 8 15:07 node-gyp.cmd