Update org.tasks metadata

metadata/org.tasks.yml

@@ -1,10 +1,16 @@
 Categories:
   - Writing
 License: GPL-3.0-only
+AuthorName: Alex Baker
+AuthorEmail: support@tasks.org
+WebSite: https://tasks.org
 SourceCode: https://github.com/tasks/tasks
 IssueTracker: https://github.com/tasks/tasks/issues
 Changelog: https://github.com/tasks/tasks/blob/HEAD/CHANGELOG.md
+Donate: https://tasks.org/donate
 FlattrID: '2308341'
+LiberapayID: '42085'
+Bitcoin: 136mW34jW3cmZKhxuTDn3tHXMRwbbaRU8s
 
 AutoName: Tasks
 Summary: Fork of Astrid Tasks & To-Do List
@@ -1024,6 +1030,9 @@ Builds:
         ../build.gradle
       - sed -i -e '/io.fabric/d' -e '/googleplayImplementation(.*) {/,/}/d; /googleplayImplementation/d'
         -e '/amazonImplementation/d' -e '/com.google.gms/d' build.gradle
+    gradleprops:
+      - tasks_mapbox_key="pk.eyJ1IjoiYmFrZXJiYSIsImEiOiJjanUxZG51dDUwMGttNDlvN3p3cHZzaXB3In0.1UWYV5dhTKiw_MkHNkA1jA"
+      - tasks_google_key="AIzaSyBP4B2O2brlJyVTWv36U1XJDY7noKEzf-4"
 
 MaintainerNotes: Upstream releases multiple version with changed vercode. Looks like
     repushing tags..