macOS grep does not have -P

[david-crow-sp]

The macOS grep command (BSD based) does not have a -P flag (perl regexp), so this part of the script (

log4jscanlinux/linux/log4j_findings.sh

Line 106 in 344d45e

ve=`unzip -p $jar_file $test 2> /dev/null | grep -Pzo "<artifactId>log4j</artifactId>\s*<version>.+?</version>"| cut -d ">" -f 2 | cut -d "<" -f 1 | head -2|awk 'ORS=NR%3?FS:RS'`;

) fails on macOS.