Force a specific target version of macOS. Otherwise, `delocate` renames the wheels! Change-Id: I03bf330332a1586deed0519b7983b1a29574ec64 Reviewed-on: https://code-review.googlesource.com/c/re2/+/62911 Reviewed-by: Jeff Bailey <[email protected]> Reviewed-by: Paul Wankadia <[email protected]>