fix: Warning, Colon operands must be real scalars

lib/+artoa/+plugins/findTrackingMethods.m

@@ -9,7 +9,7 @@ filePath = fullfile(filePath, '..', '..', '..');
 trackingMethods = dir(fullfile(filePath, 'plugins', 'tracking', '*.m'));
 
 plugins = {};
-for oTrackingMethods = 1:size(trackingMethods)
+for oTrackingMethods = 1:length(trackingMethods)
     if (trackingMethods(oTrackingMethods).isdir)
         continue;
     end