Add support for thecodingmachine/safe 2.0

[benrowe-chuffed]

Summary

Please consider adding support for thecodingmachine/safe:^2.0.

Currently this package only supports ^1.3. Not only has 1.3 not been updated in two years, it's also missing support for PHP 8.

It's possible to support both since the 2.0 interfaces are backwards compatible AFAIK.

This can be done simply by changing the composer dependency to:

"require": {
  "thecodingmachine/safe": "^1.1 || ^2",
  ...
}

[mfn]

LGTM, happy to accept a PR!

[mfn]

Fixed with #961 and released as 8.5.0