Release v0.4.0

What's Changed

• You can now pipe input from the standard input with --pipe #33
• Verbosity flags (-v, -vv, -q, etc.) and more logging/error messages have been added #40
• Added a new form for shell-specific variables and deprecated the old form. #43
• Tildes now expand #46

Minor Changes

• Use exact patch versions in xshe's Cargo.toml dependencies #41
• Bump clap from 3.1.6 to 3.1.8 by @dependabot in #37
• Bump toml from 0.5.8 to 0.5.9 by @dependabot in #44

Full Changelog: v0.3.2...v0.4.0