Update googletest to version 1.13.0
Update GoogleTest package to version 1.13.0 as requested initially for the dev4 nightlies in https://sft.its.cern.ch/jira/browse/SPI-2395
Tagging @fwinkl
Update GoogleTest package to version 1.13.0 as requested initially for the dev4 nightlies in https://sft.its.cern.ch/jira/browse/SPI-2395
Tagging @fwinkl