Create platform interface and restructure folders to accomodate (#427)

* move existing plugin to another folder

* initial commit of platform interface

* add abstract class for platform-specific notification details

* remove method channel implementation

* remove platform notification details

* add periodicallyShow method with related enum to platform interface

* add tests and release notes

* update cirrus script due to restructuring and add platform interface test task

* change osx instance in cirrus script for building ios example

.cirrus.yml

@@ -4,23 +4,31 @@ build_example_android_task:
   pub_cache:
     folder: ~/.pub-cache
   build_script:
-    - cd example
+    - cd flutter_local_notifications/example
     - flutter build apk
 
 build_example_ios_task:
   osx_instance:
-    image: mojave-flutter
+    image: mojave-xcode-11.3-flutter
   pub_cache:
     folder: ~/.pub-cache
   update_pods_script: pod repo update # to fetch all the latest versions
   build_script:
-    - cd example
-    - flutter upgrade #workaround until Cirrus has updated to latest stable Flutter SDK
+    - cd flutter_local_notifications/example
     - flutter build ios --no-codesign
 
-test_task:
+test_platform_interface_task:
+  container:
+    image: cirrusci/flutter:stable
+  test_script:
+    - cd flutter_local_notifications_platform_interface
+    - flutter test
+
+test_plugin_task:
   container:
     image: cirrusci/flutter:stable
   pub_cache:
     folder: ~/.pub-cache
-  test_script: flutter test
+  test_script:
+    - cd flutter_local_notifications
+    - flutter test

example/ios/Runner.xcodeproj/project.pbxproj → flutter_local_notifications/example/ios/Runner.xcodeproj/project.pbxproj

@@ -259,12 +259,9 @@
 			files = (
 			);
 			inputPaths = (
-				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh",
-				"${PODS_ROOT}/.symlinks/flutter/ios/Flutter.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/Flutter.framework",
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;