Use regex-lite for chrono-tz-build

[djc]

We don't need a featureful or high-performance parser for the build script.

[pitdicker]

There has been some performance tuning in the past. Maybe the benchmark example is useful to compare?

[djc]

Note that this does not change the dependency for the parse-zoneinfo crate -- only for the chrono-tz-build crate, which I think is only used for the filter-by-regex feature to filter timezone names.

[pitdicker]

Sorry, it was a comment without looking closely.

The principal difference between the regex and regex-lite crates is that the latter prioritizes smaller binary sizes and shorter Rust compile times over performance and functionality.

Locally with a CHRONO_TZ_TIMEZONE_FILTER and the filter-by-regex feature it saves 1% of the build time. I don't see much of an advantage t.b.h.

[djc]

Going to wait until after #172.