• Fix a build failure since new RC version of clap crate was released.
• Fix a dynamic link error of pcre2 library by linking the library statically. The error could happen when you installed Homebrew to non-default location on macOS (#6).
• Add --regex-size-limit option for built-in grep feature.
• Add --dfa-size-limit option for built-in grep feature.
• Use Rust compiler v1.57 to build binaries.