Get available v8 flags.

const v8flags = require('v8flags');

v8flags.fetch(); // [ '--use_strict',
                 //   '--es5_readonly',
                 //   '--es52_globals',
                 //   '--harmony_typeof',
                 //   '--harmony_scoping',
                 //   '--harmony_modules',
                 //   '--harmony_proxies',
                 //   '--harmony_collections',
                 //   '--harmony',
                 // ...

• 2014-12-22 - v1.0.8 - exclude --help flag
• 2014-12-20 - v1.0.7 - pre-cache flags for every version of node from 0.8 to 0.11
• 2014-12-09 - v1.0.6 - revert to 1.0.0 behavior
• 2014-11-26 - v1.0.5 - get node executable from process.execPath
• 2014-11-18 - v1.0.4 - wrap node executable path in quotes
• 2014-11-17 - v1.0.3 - get node executable during npm install via process.env.NODE
• 2014-11-17 - v1.0.2 - get node executable from process.env._
• 2014-09-03 - v1.0.0 - first major version release
• 2014-09-02 - v0.3.0 - keep -- in flag names
• 2014-09-02 - v0.2.0 - cache flags
• 2014-05-09 - v0.1.0 - initial release