First release compiled as a universal binary.

New features:
- universal binary (but not yet tested on Apple Silicon M1).
- add support for `edu.uo.texshop.tex` UTI used by `.tex` files.
- `highlight` updated to version 3.59 compiled as universal binary with `lua` 5.4.1 statically linked.
- The embedded `lua` library used by the main application is upgraded to version 5.4.1.

Bugfix:
- fixed a bug for the missing preview in html mode on the settings window.
- predefined output mode set to `.rtf` (less expansive that html).

Author: sbarex

Application/AppearanceView.swift

@@ -73,7 +73,7 @@ class AppearanceView: NSView {
            }
        }
 
-    var renderMode: SCSHBaseSettings.Format = .html {
+    var renderMode: SCSHBaseSettings.Format = SCSHGlobalBaseSettings.preferredFormat {
         didSet {
             styleCheckbox.isEnabled = renderMode == .html
             styleLabel.isEnabled = renderMode == .html