Configure CMake to require version 3.5.1, which is what Xenial has.

Change-Id: Iffde5091b8e9a567e61d7638c70779d7f4b6a9f3
Reviewed-on: https://code-review.googlesource.com/c/re2/+/44151
Reviewed-by: Paul Wankadia <junyer@google.com>
1 file changed