If true, npm does not run scripts specified in package.json files.
Note that commands explicitly intended to run a particular script, such as npm start, npm stop, npm restart, npm test, and npm run-script will still run their intended script if ignore-scripts is set, but they will not run any pre- or post-scripts.
Default: '/bin/sh' on POSIX systems, 'cmd.exe' on Windows
Type: null or String
The shell to use for scripts run with the npm exec, npm run and npm
init <pkg> commands.