v4.0.0

Breaking:

• Require Node.js 8 9374484
• TypeScript users only:
  • Only use a CommonJS export for the TypeScript definition 975b51f
    You need to change import filenamify from 'filenamify'; to import filenamify = require('filenamify');
  • Remove the TypeScript Filenamify interface 4685cc1

v3.0.0...v4.0.0