Version 1.44

• Added sum method for array.
• Added U.filter() for iterable.
• Added support for U.nonNull(object).
• Added new chunk() and chunkFilter().
• Added methods U.singleOrNull(iterable) and U.singleOrNull(iterable, predicate).
• Added method U.cycle(iterable, times).
• Added method U.toCardinalityMap(iterable).
• Added U.interpose(iterable, element) and U.interposeByList(iterable, elements) methods.
• Added methods containsAtLeast(iterable, value, count) and containsAtMost(iterable, value, count).
• Added U.splitAt(iterable, position) method.
• Added U.repeat(element, times) method.
• Added U.binarySearch(iterable, value) method.
• Added U.first(iterable, pred, n) method and fix other U.first() methods.
• Improved U.fill(list, item), added U.fill(array, item) methods.
• Added U.average(iterable) and U.average(iterable, function) methods.
• Added U.explode(string) and U.implode(strings) methods.
• Added U.replace(iterable, predicate, value) and U.replaceIndexed() methods.
• Improved U.concat(iterables) method.
• Added U.takeSkipping(iterable, stepSize) method.
• Added U.subtract(values) method.
• Changed return value for methods U.range(stop), U.range(start, stop) and U.range(start, stop, step).
• Improved U.functions(object) method.
• Removed U.shortestPathAllKeys(grid).