Upgrade .gitignore, .metadata and analysis_options.yaml in example/

Author: imaNNeo

example/.gitignore

@@ -1,15 +1,17 @@
 # Miscellaneous
+.flutter-plugins
 *.class
 *.log
 *.pyc
 *.swp
 .DS_Store
 .atom/
+.build/
 .buildlog/
 .history
 .svn/
-
-pubspec.lock
+.swiftpm/
+migrate_working_dir/
 
 # IntelliJ related
 *.iml
@@ -24,53 +26,21 @@ pubspec.lock
 
 # Flutter/Dart/Pub related
 **/doc/api/
+**/ios/Flutter/.last_build_id
 .dart_tool/
-.flutter-plugins
-.packages
+.flutter-plugins-dependencies
 .pub-cache/
 .pub/
 /build/
-.flutter-plugins-dependencies
+/coverage/
 
-# Android related
-**/android/**/gradle-wrapper.jar
-**/android/.gradle
-**/android/captures/
-**/android/gradlew
-**/android/gradlew.bat
-**/android/local.properties
-**/android/**/GeneratedPluginRegistrant.java
+# Symbolication related
+app.*.symbols
 
-# iOS/XCode related
-**/ios/**/*.mode1v3
-**/ios/**/*.mode2v3
-**/ios/**/*.moved-aside
-**/ios/**/*.pbxuser
-**/ios/**/*.perspectivev3
-**/ios/**/*sync/
-**/ios/**/.sconsign.dblite
-**/ios/**/.tags*
-**/ios/**/.vagrant/
-**/ios/**/DerivedData/
-**/ios/**/Icon?
-**/ios/**/Pods/
-**/ios/**/.symlinks/
-**/ios/**/profile
-**/ios/**/xcuserdata
-**/ios/.generated/
-**/ios/Flutter/App.framework
-**/ios/Flutter/Flutter.framework
-**/ios/Flutter/Generated.xcconfig
-**/ios/Flutter/app.flx
-**/ios/Flutter/app.zip
-**/ios/Flutter/flutter_assets/
-**/ios/ServiceDefinitions.json
-**/ios/Runner/GeneratedPluginRegistrant.*
-**/ios/Flutter/Flutter.podspec
+# Obfuscation related
+app.*.map.json
 
-# Exceptions to above rules.
-!**/ios/**/default.mode1v3
-!**/ios/**/default.mode2v3
-!**/ios/**/default.pbxuser
-!**/ios/**/default.perspectivev3
-!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release

example/.metadata

@@ -1,23 +1,35 @@
 # This file tracks properties of this Flutter project.
 # Used by Flutter tool to assess capabilities and perform upgrades etc.
 #
-# This file should be version controlled.
+# This file should be version controlled and should not be manually edited.
 
 version:
-  revision: 90c64ed42ba53a52d18f0cb3b17666c8662ed2a0
-  channel: stable
+  revision: "20f82749394e68bcfbbeee96bad384abaae09c13"
+  channel: "stable"
 
 project_type: app
 
 # Tracks metadata for the flutter migrate command
 migration:
   platforms:
     - platform: root
-      create_revision: 90c64ed42ba53a52d18f0cb3b17666c8662ed2a0
-      base_revision: 90c64ed42ba53a52d18f0cb3b17666c8662ed2a0
-    - platform: windows
-      create_revision: 90c64ed42ba53a52d18f0cb3b17666c8662ed2a0
-      base_revision: 90c64ed42ba53a52d18f0cb3b17666c8662ed2a0
+      create_revision: 20f82749394e68bcfbbeee96bad384abaae09c13
+      base_revision: 20f82749394e68bcfbbeee96bad384abaae09c13
+    - platform: android
+      create_revision: 20f82749394e68bcfbbeee96bad384abaae09c13
+      base_revision: 20f82749394e68bcfbbeee96bad384abaae09c13
+    - platform: ios
+      create_revision: 20f82749394e68bcfbbeee96bad384abaae09c13
+      base_revision: 20f82749394e68bcfbbeee96bad384abaae09c13
+    - platform: linux
+      create_revision: 20f82749394e68bcfbbeee96bad384abaae09c13
+      base_revision: 20f82749394e68bcfbbeee96bad384abaae09c13
+    - platform: macos
+      create_revision: 20f82749394e68bcfbbeee96bad384abaae09c13
+      base_revision: 20f82749394e68bcfbbeee96bad384abaae09c13
+    - platform: web
+      create_revision: 20f82749394e68bcfbbeee96bad384abaae09c13
+      base_revision: 20f82749394e68bcfbbeee96bad384abaae09c13
 
   # User provided section
 

example/analysis_options.yaml

@@ -13,8 +13,7 @@ linter:
   # The lint rules applied to this project can be customized in the
   # section below to disable rules from the `package:flutter_lints/flutter.yaml`
   # included above or to enable additional rules. A list of all available lints
-  # and their documentation is published at
-  # https://dart-lang.github.io/linter/lints/index.html.
+  # and their documentation is published at https://dart.dev/lints.
   #
   # Instead of disabling a lint rule for the entire project in the
   # section below, it can also be suppressed for a single line of code