Bug fixes and improvements

* Adds `keychain_path` option to `resign` action (#5934)
* Adds `use_app_entitlements` option to `resign` action (#5130)
* Adds `SCAN_GENERATED_PLIST_FILES` env var to `scan` action (#5740)
* Adds `danger_id` and `dangerfile` option to `danger` action (#5894)
* Don't post the lane when using `slack` as one-off action (#5899)
* Fix lane name conflict when creating a new Fastfile (#5895)
* Added support for json format to `pod_push` action (#5869)
* Add an additional set of accepted codesign details for Xcode 8 (#5821) (#5822)
* Add shell escaping to Crashlytics path in `crashlytics` action (#5870)
* Fixed issue in `copy_artifacts` action when artifact contained parens (#5812)
* Updated to latest version of `spaceship` to address issues with modifying object in the dev portal

https://github.com/fastlane/fastlane/releases/tag/1.102.0
