Provision Power Process v 1.2.0

• Use symfony console 3 - 4de0a0f
• Adding a demo.php file - 80ec911
• Add ps call and rm -rf call. - 877120c
• Adding to README. - 9c39ceb
• Adding demo.png - 46c4eca
• Add a longer running command to demo.php. - 5a48122
• Add "run" script for demonstration purposes. - a08ee4d
• Adding run script to readme. - 737c2ea
• Add environment variable PROVISION_PROCESS_OUTPUT to allow direct out - 7f7699f
• Add duration property for later retrieval - 7f07c85
• Update to robo 2 - a974adf
• Add a github actions file to test that 'run' script works. - ddf3203