Improve the method signature of Option::fromValue to better understand nullable/optional value

[ojhaujjwal]

When using Option::fromValue($something), psalm decoded it was Option<string | null> because $something is of type string | null.

This is the psalm error I got in my codebase:

However, I want to let psalm know that even if I pass something like null to Option::fromValue ,the output is actually only Option<string> instead of Option<string | null>.

[ojhaujjwal]

@schmittjoh It would be great if you could review this.