Add direct additional PR output

🏷 v1.1.0 Description

Adds:

• prUrl
• prTitle
• prCreatedAt
• prMergedAt
• prClosedAt
  ... as direct accessible output from the workflow

Fixed Workflow

• Fixed #4
• Added small test case #5

First Version

First Version

Functionality

• filter out closed PRs
• return JSON of whole PR object