This is an optional dependency of jiff that embeds the entire IANA Time Zone
Database into the compiled binary. Specifically, it embeds the binary TZif
for each time zone.
This is most typically used on Windows where there is no standard location
for a system copy of the Time Zone Database. On macOS and Linux, one must
explicitly opt into using jiff-tzdb. By default, in Unix environments, Jiff
will look for a system copy of the Time Zone Database.