Release 4.0.1

4.0.1

• Account for new rustup show active-toolchain format. Rustup 1.28 had two changes affecting Dylint. One was a change in rustup show active-toolchain's output format; the other was the fact that Rustup no longer automatically installs uninstalled toolchains. This release addresses the former, but not the latter, i.e., you may need to manually install toolchains until the next release. To manually install a toolchain, either cd to a directory containing a rust-toolchain file and type rustup toolchain install, or type rustup toolchain install TOOLCHAIN, where TOOLCHAIN is the toolchain you wish to install. (bda492f and 7e104fd)—thanks @ClSlaid for the fix