v0.1.0-beta.3

Updates

• 5659fab Compiled with latest Rust v1.48.0
• 49d61de Update dependencies 2020-12-14 (also 9720147, 4ed6954)
• 3810c07 Docker image using Alpine v3.12

Features

• 3481ae1 Add Github, Bitbucket and Gitlab host providers via --provider flag for add command. It resolves #4