build: Update changelog and readme for 1.7.3

CHANGELOG.md

@@ -1,3 +1,6 @@
+## [1.7.3] - 9th Jan 2023
+Mark package as discontinued.
+
 ## [1.7.2] - 4th Oct 2023
 
 - chore: add general and publish ci (td)

README.md

@@ -1,3 +1,7 @@
+# Deprecation Notice:
+
+This package will soon be merged with the [Matrix Dart SDK](https://pub.dev/packages/matrix) and from there be available as a library, not a stand alone package anymore. We hope that this will save us some overhead when maintaining the code. If you rely on this package as stand alone and importing the whole Matrix Dart SDK just to use this library is not an option for you, please open an issue here: https://github.com/famedly/dart_matrix_api_lite/issues
+
 # Matrix API Lite
 
 This package is a dead simple data model over the client-server specification of https://matrix.org and is mostly used as a base for a more complete Matrix SDK.

pubspec.yaml

@@ -1,6 +1,6 @@
 name: matrix_api_lite
 description: Dead simple data model for the matrix.org client-server API.
-version: 1.7.2
+version: 1.7.3
 homepage: https://famedly.com
 repository: https://github.com/famedly/dart_matrix_api_lite
 issues: https://github.com/famedly/dart_matrix_api_lite/issues