Update type annotations to use pipe | for union types

[ryanhill1]

Since this project is restricted to Python 3.10 and above, we can take advantage of the newer, preferred syntax for combined types using the pipe (|) operator in type annotations. This syntax is more concise and replaces the need for Union from the typing module.

For example:

from typing import Union

def validate(program: Union[openqasm3.ast.Program, str]) -> None:

can now be simplified to:

def validate(program: openqasm3.ast.Program | str) -> None:

We should apply this updated syntax to all instances where Union is used.

[mthomsonbrown]

Just browsing open issues on github and this project looks pretty interesting. I wouldn't mind taking on this enhancement. I haven't pulled the project yet, but I love me some syntax optimization!

[TheGupta2012]

@mthomsonbrown go ahead, you're very welcome!

[mthomsonbrown]

Cool! I'll get an environment set up and hopefully tackle it this weekend.

[ryanhill1]

@mthomsonbrown Still interested in this?

[mthomsonbrown]

Sorry, I got bogged down with some other stuff. If you want it to get done soon, go ahead and reassign.

[ryanhill1]

@mthomsonbrown No rush on it! Just checking. Not urgent