age: 1.0.0-beta2 -> unstable-2020-03-25

There has been no new official release of age,
but some important fixes and changes have been
done since the last release in December:
https://github.com/FiloSottile/age/compare/v1.0.0-beta2...f0f8092d60bb96737fa096c29ec6d8adb5810390