SuiteSparse v5.2.0, Mar 15, 2018
* GraphBLAS 2.0.1: bug fix to GxB_kron
* SuiteSparse_config: corrected back to SO_VERSION 5
* GraphBLAS 2.0.0: with changes to API to conform to the latest
specification. The SO_VERSION of GraphBLAS must change,
as a result, since this affects both the ABI and API interface.
* CHOLMOD 3.1.12: bug fix (no change to the CHOLMOD ABI or API)
* KLU 1.3.9: minor edit, not a bug fix, but code is more clear now