Fix upgrade for first major versions

scripts/upgrade

@@ -247,17 +247,19 @@ then
         major_version=${last_version%%.*}
         current_major_version=${current_version%%.*}
 
+        # Load the value for this version
+        source upgrade.d/upgrade.$current_major_version.sh
+
         # If the current version has the same major version than the next one,
         # then it's the last upgrade to do
-        if [ "$major_version" -eq "$current_major_version" ]; then
+        # We also cover the case where the last version is the first of the current major version series
+        # (e.g. 19.0.0 is the latest version)
+        if [[ ("$major_version" -eq "$current_major_version") || ( ("$major_version" -eq "$((current_major_version+1))") && ("$next_version" == "$last_version") ) ]]; then
         current_major_version=last
         # Execute the commands dedicated to the last upgrade
         last_upgrade_operations
         fi
 
-        # Load the value for this version
-        source upgrade.d/upgrade.$current_major_version.sh
-
         ynh_print_info --message="Upgrade to nextcloud $next_version"
 
         # Create an app.src for this version of nextcloud