`GenericConstraint<T> or()` might have unexpected behavior for chained constraints

[BaptBeuns]

When writing something like:

constraint1.or(constraint2, constraint3)

The generated SQL statement is the following:

WHERE (constraint1 OR (constraint2) AND (constraint3))

I think we should expect this to be the following:

WHERE (constraint1 OR ((constraint2) AND (constraint3)))

Let me know if I'm doing things wrong. I'll submit a PR for that in the next minutes.

[BaptBeuns]

This is not accurate, the precedence of AND on OR makes the parentheses useless.