Crash when app goes to background before animation is complete

[twestley]

Expected Behaviour

Animation stops when app goes to background or completes successfully while in background

Actual Behaviour

"Fatal error: Index out of range," on line 134, "animate[value-1].toggle()" value in this statement is 0 leading to "index out of range"

Steps to Reproduce the Issue

• Do something that triggers confetti animation
• Press Home button before animation is complete
• Reproduce

[simibac]

Thanks for the PR. Should be fixed now in the latest release.