Update operation.

[karastojko]

No description provided.

[RubaXa]

Maybe

update(newValue, criteria) {
    const pos = this.data.findIndex(criteria);
    if (pos < 0) {
        return false;
    }

    this.data[pos] = newValue;
    
    const childPos = (pos << 1) + 1;
    const needsDown = (pos === 0 || (childPos < this.length && this.compare(newValue, this.data[childPos]) > 0));
    
    this[needsDown ? '_down' : '_up'](pos);

    return true;
}

[RubaXa]

Suggested change

	export declare type Criteria<T> = (val: T) => boolean;
	export declare type Criteria<T> = (val: T, index: number, values: T[]) => boolean;