update: .gitignore.

Author: ItzNotABug

.gitignore

@@ -43,3 +43,41 @@ app.*.map.json
 /android/app/debug
 /android/app/profile
 /android/app/release
+
+# Apple
+**/*.xcodeproj/xcuserdata/
+**/*.xcworkspace/xcuserdata/
+**/.swiftpm/xcode/xcuserdata/
+**/*.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
+**/*.xcworkspace/xcshareddata/*.xccheckout
+**/*.xcworkspace/xcshareddata/*.xcscmblueprint
+**/*.playground/**/timeline.xctimeline
+
+# Build
+**/.build/
+**/Build/
+DerivedData/
+*.ipa
+
+# Carthage
+Carthage/
+
+# CocoaPods
+Pods/
+
+# fastlane
+fastlane/report.xml
+fastlane/Preview.html
+fastlane/screenshots
+fastlane/test_output
+fastlane/sign&cert
+
+# CSV
+*.orig
+.svn
+
+# Other
+*~
+*.save
+._*
+*.bak