Updated .gitignore

Author: orchetect

.gitignore

@@ -37,7 +37,9 @@ timeline.xctimeline
 playground.xcworkspace
 
 ## SPM support in Xcode
-.swiftpm
+# .swiftpm - for shared CI schemes we need these checked in:
+#     -> .swiftpm/xcode/package.xcworkspace
+#     -> .swiftpm/xcode/xcshareddata/xcschemes/*.*
 
 # Swift Package Manager
 #
@@ -72,4 +74,4 @@ Carthage/Build
 fastlane/report.xml
 fastlane/Preview.html
 fastlane/screenshots/**/*.png
-fastlane/test_output
+fastlane/test_output