Log Message:
yarn: updated to 1.19.2

1.19.2
Folders like .cache won't be pruned from the node_modules after each install.
Correctly installs workspace child dependencies when workspace child not \ 
symlinked to root.
Makes running scripts with Plug'n Play possible on node 13.
Change run command to check cwd/node_modules/.bin for commands. Fixes run in \ 
workspaces.