Automate App Store screenshot and metadata

[teolemon]

What

• Add Confidentiality statement automation to Fastlane #15
• Add Contact information automation to Fastlane #16
• Add Copyright information automation to Fastlane #17

Part of

• Automation of the release process (for marketing assets) smooth-app#536

[monsieurtanuki]

For the record, about the iOS screenshots, the simulators I chose for my own app:

• 6.5" - iPhone 11 Pro Max (1242x2688)
• 5.5" - iPhone 8 Plus (1242x2208)
• ipad Pro (12.9") (4th generation) (2048x2732)

[andylin2004]

For what it's worth now, I don't think the iPhone 5.5 inch and iPad Pro 12.9 inch 2nd gen screenshots are required now. See: https://developer.apple.com/help/app-store-connect/reference/screenshot-specifications/