parse-zoneinfo v0.3.1

With parse-zoneinfo 0.3.1 we merged in the history of zoneinfo-parse from before the library was forked. The crate has now also moved into the git repository and workspace of chrono-tz.

Additions

• Implement Default for LineParser
• Implement std::error::Error for error types

Fixes

• Make regex for UNTIL column more precise to parse comments correctly

Changes

• Update to Rust 2021 edition

Documentation

• Merge readme and API documentation from zoneinfo-parse 0.5.0
• Remove incomplete changelog (see GitHub releases instead)
• Update readme
• Add badges to readme

Internal

• Move parse-zoneinfo into chrono-tz workspace
• Fix Rust and Clippy warnings
• Revert to default rustfmt style