cargo-msrv v0.4.0

0.4.0 - 2021-04-09

• Added option to only take the latest patch Release version into acount, and make it the default
• Added minimum and maximum release version options, which can be used to restrict the range of version to be checked
• Change default check command to cargo check -all (was cargo build --all)
• Add option to output a rust-toolchain file
• Add option to use a binary search instead of a linear search to find the MSRV