chrono-tz v0.6.0: 2021a

TZDB version 2021a (2021-01-24).

See also the skipped 2020b, 2020c, 2020d, 2020e and 2020f releases of the time zone database.

Changed

• Breaking change: The 2020b update of the time zone database removed the US/Pacific-New timezone (#68).
• Use a perfect hash table to parse timezones (#84, thanks @petrosagg).
• Support case-insensitive timezone parsing behind case-insensitive feature (#84, thanks @petrosagg).

Additions

• Support filtering the set of timezones with a new filter-by-regex feature which uses CHRONO_TZ_TIMEZONE_FILTER env var.
  It should be set to a regular expression of timezones to include. (#69)

Internal

• Improve error message if tz data file is missing (#68).
• chrono-tz-build: fix cargo metadata (#70).
• Switch default branch to main (#71)
• CI: Update Ubuntu 16.04 to 18.04 (#86)