Update typings

[glen-cheney]

Fixes

• Fix bad default parameters for enable, update, and getSize.
• Fix missing Css export on Shuffle.ShuffleItem.Css.
• Fix Shuffle.ALL_ITEMS and Shuffle.FILTER_ATTRIBUTE_KEY not being overridable.

New

• Add types for .sort() method's options: SortOptions.
• Add types for .filter()'s function signature.
• Add types for ShuffleItem.Css.

Tests

• Add test ts file.
• Run tsc on test file during tests.

Breaking (TypeScript only)

• Changed all Element to HTMLElement.
• Shuffle.ShuffleOptions is now exported top-level.

  import Shuffle, { ShuffleOptions, SortOptions } from 'shufflejs';