support php 74 props

Signed-off-by: RJ Garcia <ragboyjr@icloud.com>

Composer 2.0 support

Signed-off-by: RJ Garcia <rj@stadiumgoods.com>

Better support toPhpString on more cases

- nullable arrays now show up as nullable in toPhpString
- Union types are now returned as empty to indicate no type
  definition instead of returning the first type which is too
  restrictive

Signed-off-by: RJ Garcia <ragboyjr@icloud.com>

Merge pull request #3 from krakphp/exit-on-changes

Fail on Changes

Merge pull request #1 from krakphp/options

Options Support

Files without match are left untouched

Signed-off-by: RJ Garcia <ragboyjr@icloud.com>

Minor typo in workflow yaml

Signed-off-by: RJ Garcia <ragboyjr@icloud.com>