Bump libraries-bom from 20.4.0 to 20.5.0 (#377)
Bump libraries-bom from 20.4.0 to 20.5.0 (#377)

Bumps [libraries-bom](https://github.com/GoogleCloudPlatform/cloud-opensource-java) from 20.4.0 to 20.5.0.
- [Release notes](https://github.com/GoogleCloudPlatform/cloud-opensource-java/releases)
- [Changelog](https://github.com/GoogleCloudPlatform/cloud-opensource-java/blob/master/CHANGELOG.md)
- [Commits](https://github.com/GoogleCloudPlatform/cloud-opensource-java/commits)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
GoogleCloudPlatform/cloud-spanner-r2dbc,GoogleCloudPlatform/cloud-spanner-r2dbc,GoogleCloudPlatform/cloud-spanner-r2dbc