A DESCRIPTION OF THE PROBLEM :
Unable to update timezone db at version 2020b & 2020c on JDK 8

tzupdater version used 2.3.1
JDK flavor adoptopenjdk
JDK version JDK 8u265


$ java -jar tzupdater.jar -v -u -f -l file:tzdata-latest.tar.gz
    Using file:tzdata-latest.tar.gz as source for tzdata bundle.
    java.home: /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home/jre
    java.vendor: AdoptOpenJDK
    java.version: 1.8.0_265
    tzupdater version 2.3.1-b02
    JRE tzdata version: tzdata2020a
    Downloaded file to /var/folders/k4/d4wwf5sd71b0hnp7lvrv1wk40000gn/T/tz.tmp_6/tzdata.tar.gz
    tzupdater tool would update with tzdata version: tzdata2020b
    Source directory does not contain source file: pacificnew
    $ echo $?
    1

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
 - download tzdbdata version 2020b or 2020c from ihttps://www.iana.org/time-zones
 - download timezone updater tool from oracle at version 2.3.1 https://www.oracle.com/java/technologies/javase/tzupdater-readme.html
 - run `java -jar tzupdater.jar -v -u -f -l file:tzdata-latest.tar.gz`


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
 - timezone database in JDK should be upgraded
ACTUAL -
 - fails to update