Tigase Messenger: cannot reach git repo, add NoSourceSince

metadata/org.tigase.messenger.phone.pro.yml

@@ -29,9 +29,6 @@ Description: |-
     (sure.im, jabber.me, tigase.im), on other servers, some functions may be
     unavailable.
 
-RepoType: git
-Repo: https://repository.tigase.org/git/tigase-mobilemessenger.git
-
 Builds:
   - versionName: 1.5.1
     versionCode: 11
@@ -53,3 +50,5 @@ AutoUpdateMode: None
 UpdateCheckMode: Tags
 CurrentVersion: 3.0.11
 CurrentVersionCode: 74
+
+NoSourceSince: '1.6'