Animation LifeCycle Exception

[atiqsamtia]

When the Loader is disposed of, the animation is not disposed of and causes exceptions in the terminal.

════════ (74) Exception caught by animation library ════════════════════════════════════════════════
'package:flutter/src/widgets/framework.dart': Failed assertion: line 3658 pos 12: '_debugLifecycleState != _ElementLifecycle.defunct': is not true.

These Loades are affected

• zigzag
• fourballs
• pulse

[atiqsamtia]

Fixed in Pull Request #2