release 2023-06-02

`target_compile_definitions()` needs a scope keyword.

Fixes #429.

Change-Id: I58ca8ecea8854dd899f711938c49fe75bfff640d
Reviewed-on: https://code-review.googlesource.com/c/re2/+/61393
Reviewed-by: Perry Lorier <perryl@google.com>
Reviewed-by: Paul Wankadia <junyer@google.com>