update dependencies and bump version to 0.1.7+45

- Bump version to `0.1.7+45` and update SDK constraint to `>=3.8.0 <4.0.0`.
- Update numerous dependencies

lib/api/marianumcloud/talk/reactMessage/reactMessageParams.g.dart

@@ -7,11 +7,7 @@ part of 'reactMessageParams.dart';
 // **************************************************************************
 
 ReactMessageParams _$ReactMessageParamsFromJson(Map<String, dynamic> json) =>
-    ReactMessageParams(
-      json['reaction'] as String,
-    );
+    ReactMessageParams(json['reaction'] as String);
 
 Map<String, dynamic> _$ReactMessageParamsToJson(ReactMessageParams instance) =>
-    <String, dynamic>{
-      'reaction': instance.reaction,
-    };
+    <String, dynamic>{'reaction': instance.reaction};