3.1.0
3.1.0

- Closes #183. Addresses some issues with using the example in strict mode.
- Closes #231. Replaces Buffer() with Buffer.from().
- Closes #233. Uses underscore in a manner more compatible with TypeScript.
- Closes #238. Replaces body-parser with urlencoded() for express >=4.
- Adds maintenance notice.

Clever/saml2