beta 1.3 released! 🎉 🎉🎉

Changes:

• New score plot now highlights only intervals that were practiced. Also fixed a couple of instances were the plot wasn't correctly reporting missed intervals.
• Redo failures option. After a round of questions is completed, you'll now see a redo button that lets you replay the questions you got wrong.
• -60db release gate. Note detection now releases at a -60db value instead of absolute zero. Better precision when detecting release of notes on your guitar.
• Gray out input bar during example to show you cannot input notes during this time.