configure flutter_libs as a separate package, an additional flutter-only dependency

Author: vaind

README.md

@@ -4,9 +4,13 @@ ObjectBox for Dart is a standalone database storing Dart objects locally, with s
 
 Flutter/Dart compatibility
 --------------------------
+Starting with Flutter 1.20, additional changes were required, starting from objectbox-dart v0.7.0. 
+To make sure your Flutter application works after update to Flutter 1.20, add `objectbox_flutter_libs: ^0.7.0` 
+as an additional dependency, in addition to `objectbox`.
+
 This library depends on a new Dart feature, FFI, introduced in Dart 2.5 (Flutter 1.9) as a feature preview. 
 However, it has changed significantly in Dart 2.6/Flutter 1.12, i.e. introduced breaking changes we had to reflect.
-Versions starting with ObjectBox 0.5 support Dart 2.6+ as well as Flutter 1.12+.
+Versions between ObjectBox v0.5 up to v0.6.x support Dart 2.6+ as well as Flutter 1.12+ and Flutter 1.17+.  
 
 The last supported version for Flutter 1.9/Dart 2.5 is ObjectBox 0.4.*, so if you can't upgrade yet, please use the 
 latest 0.4.x version instead.
@@ -25,6 +29,12 @@ dev_dependencies:
 
 Proceed based on whether you're developing a Flutter app or a standalone dart program:
 1. **Flutter** only steps:
+    * Add additional dependency to include native libraries (required in Flutter):
+      ```yaml
+      dependencies:
+        objectbox: ^0.6.4
+        objectbox_flutter_libs: ^0.6.4
+      ```
     * Install the packages `flutter pub get`
     * XCode/iOS: under Architectures replace `${ARCHS_STANDARD)` with `arm64` (or `$ARCHS_STANDARD_64_BIT`).
       See [FAQ](#faq) for details.

example/flutter/objectbox_demo/pubspec.yaml

@@ -12,6 +12,7 @@ dependencies:
   path_provider: any
   intl: any
   objectbox: ^0.6.4
+  objectbox_flutter_libs: ^0.6.4
 
 dev_dependencies:
   flutter_test:

flutter_libs/README.md

@@ -1,5 +1,7 @@
 ObjectBox libraries Flutter
 ==========================
 This package provides native ObjectBox library as a flutter plugin for supported platforms.
-Should be used as part of the https://pub.dev/packages/objectbox package, not separately. 
+You should add this package as a dependency when using https://pub.dev/packages/objectbox with Flutter.
+
+See https://pub.dev/packages/objectbox for more details and information how to use ObjectBox. 
 

flutter_libs/pubspec.yaml

@@ -6,6 +6,12 @@ description: ObjectBox is a super-fast NoSQL ACID compliant object database. Thi
 
 environment:
   sdk: ">=2.6.0 <3.0.0"
+  flutter: ">=1.12.0 <2.0.0"
+
+dependencies:
+  # This is here just to ensure compatibility between objectbox-dart code and the libraries used
+  # You should still depend on objectbox directly in your Flutter application.
+  objectbox: 0.6.4
 
 flutter:
   plugin:

pubspec.yaml

@@ -11,7 +11,6 @@ dependencies:
   # take care updating flatbuffers - keep aligned with other bindings
   flat_buffers: 1.12.0
   ffi: ^0.1.3
-  objectbox_flutter_libs: 0.6.4
 
 dev_dependencies:
   build_runner: ^1.0.0