Some TS types should be nullable

[banacorn]

Some function returns null:

console.log(bst.lowerBound(60).getKey()); // 60
console.log(bst.lowerBound(60, false).getKey()); // 50
console.log(bst.lowerBound(10)); // null

However, this is not reflected in the TS type definition file

binary-search-tree/src/binarySearchTree.d.ts

Line 9 in 74e9a83

lowerBound(k: T, includeEqual?: boolean): BinarySearchTreeNode<T, U>;

[eyas-ranjous]

Thanks for reporting @banacorn I I'll fix this soon.