v4.0.0

Breaking

• Require Node.js 12 f8e7fb6

v3.0.0...v4.0.0

v3.0.0

Breaking:

• Require Node.js 8 (#7) 0080c33
• Return undefined instead of null (#7) 0080c33

Enhancements:

• Add TypeScript definition (#7) 0080c33

v2.1.0...v3.0.0