Fix parse top artists data when empty or loading state.

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.39
-app.versionCode=39
+app.versionName=0.0.40
+app.versionCode=40

fastlane/metadata/android/en-US/changelogs/40.txt

+Fix compute "top artists" data.

fastlane/metadata/android/fr-FR/changelogs/40.txt

+Correction sur calcul des données "top artistes".

lib/models/topartists.dart

@@ -55,7 +55,7 @@ class TopArtistsData {
     List<TopArtistsDataValue> topArtists = [];
     Map<String, List<TopArtistsStreamDataValue>> topArtistsStream = {};
 
-    json?['top-artists'].forEach((element) {
+    json?['top-artists']?.forEach((element) {
       TopArtistsDataValue value = TopArtistsDataValue(
         artistName: element['artistName'] as String,
         count: element['count'] as int,
@@ -64,7 +64,7 @@ class TopArtistsData {
       topArtists.add(value);
     });
 
-    json?['top-artists-stream-by-date'].keys.forEach((date) {
+    json?['top-artists-stream-by-date']?.keys?.forEach((date) {
       if (json['top-artists-stream-by-date'][date] is Map<String, dynamic>) {
         Map<String, dynamic> content = json['top-artists-stream-by-date'][date];
 

pubspec.yaml

@@ -3,7 +3,7 @@ description: Display scrobbles data and charts
 
 publish_to: 'none'
 
-version: 0.0.39+39
+version: 0.0.40+40
 
 environment:
   sdk: '^3.0.0'