• Always enable 24-bit colors on Windows because 24-bit colors support is available since Windows 10.0.15063 (released on April 5, 2019).
• Add the document which explains how hgrep detects terminal color support.
• Support generating a completion script for Nushell by --generate-completion-script nushell.
• Set codegen-units to 1 on release build. This made the binary size 1.14x smaller and improved the performance by 1.05x faster.
• Update dependencies to the latest versions including large update of regex crate (v1.9.1).
• Do not depend on terminfo crate on Windows.