- NEW: Encode plain text into symbol language

   - Multi-Cache Variables can be exported
   - optimization and bug fixes

   - new code table: Birds on wire
   - new code table: Conway
   - new code table: Dragon 1
   - new code table: Dragon 2
   - new code table: Umbra
   - support iOS 13 and iPhone 11
   - optimization and bug fixes

   - new code table: Efkolia
   - new code table: Furthark
   - new code table: Futhark
   - new code table: Kayah
   - new code table: Marain
   - new code table: Pasleys Telegraph
   - new code table: Phoenician