1) Fixed unexpected behavior of `dvc pipeline show --dot`, that led to accidental stage file corruption; Kudos TomHortons :tada:
2) Updated bash/zsh completion;
3) Switched from python2 to python3.7 when building our binary packages;
4) Added support for `-R|--recursive` flag for `dvc repro`; Kudos prihoda :tada:
5) Temporarily rolled back cache dir optimization to a more robust but slower cache verification logic. The new optimization is coming soon;