Add working-directory input to match ruby/setup-ruby

v1.5.0

Add working-directory input to match ruby/setup-ruby

Update MSYS2 to 2020-04-13

v1.4.0

RELEASE_ASSET to '2020-04-13'

Add log grouping & timing, misc clean up

v1.3.0

setup-ruby logging

Update apt-get (retry) and brew. Must use _update_

apt-get - add retry, apt-get & brew updates

_update_ must be specified when only installing packages

apt-get - always perform update

v1.1.0

Add Actions macOS & Ubuntu

Initial Release

v1.0.0

mswin - use forward slashes for OPT_DIR and SSL_DIR