v0.4.1

🚀 New features and improvements

• refactor: use argparse to replace getopt by @shenxianpeng in #52

📝 Documentation updates

• docs: updaste gitstats help by @shenxianpeng in #55
• docs: update readme about how to install gnuplot by @shenxianpeng in #48
• chore: update gitpod.yml and add contributors by @shenxianpeng in #51

Full Changelog: v0.4.0...v0.4.1