Update to new action.yml syntax

As mentioned by the GitHub team an action needs to provide an action.yamlfile.

Update to new YAML syntax

• update dependencies
• Update workflow to use YAML syntax
• update README.MD to use new YAML syntax

Some smaller updates

• uses only a entrypoint.js file
• removes additional args parsing npm package

v0.0.4-alpha

try index.js entrypoint

v0.0.3-alpha

• update to correct path

v0.0.2-alpha

• Adds Readme
• Now you should be able to pass your own WebPageTest server

First draft

0.0.1

update formatting