commit 95120170afa0cf622a18da37d3af58abf8ecd40e
Author: Yoshito Umaoka <yumaoka@users.noreply.github.com>
Date:   Wed Jan 27 09:48:37 2021 -0500

    ICU-21467 tzdata 2021a updates. Also updated build script. With this … (#17)
    
    change, we no longer release ICU time zone data updates for ICU 4.2 or older releases.