Slack Screenshots

[chrisballinger]

• Add slackshots lane for posting screenshots to Slack. It will only work if run on CI, and is intended to be run after the CircleCI build artifacts are uploaded.
• Slather now includes output from both targets (Services and debug-PRODUCTNAME.app)! Unfortunately you need to manually add new targets in two places because of slightly different syntax between xcov and slather.
• Run Danger twice to get faster feedback, once after tests/coverage, and again after screenshots
• Less brittle bundle gem caching, so Ruby updates won't cause issues

[raizlabs-oss-bot]

	4 Messages
:book:	Test Results
:book:	Code Coverage: xcov
:book:	Code Coverage: Slather
:book:	Screenshots

Current coverage for Services.framework is 68.68%

✅ No files affecting coverage found

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Current coverage for debug-PRODUCTNAME.app is 1.81%

✅ No files affecting coverage found

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Generated by :no_entry_sign: Danger