First steps to PHP 8 support

Fix memory leak on deque filter exception

Move next power of 2 to common

Improve deque allocation boundaries and foreach

Fix memory leaks, smarter reallocations

Small refactor of deque_push_va

Replace allocation macros with safer functions

Small refactor of deque.c

Small refactor and adjustment to htable find by position

Fix memory leaks, minor refactoring

Fix divide by zero errors in deque and vector rotate

Adjust reference counts in destructive iterators

Minor refactor of return values

Fix apply refcounts

Remove zval replace macro

Attempt to correct refcounts in ::apply

Fix return dtor macro

Refactor of queue iterator

Fix many memory leaks

Fix object release memory leaks #30

Small deque.c refactor

Fix contains to be true for empty search

Add Set::sorted,reversed,sum and Map::sorted,ksorted,reversed,sum

Fix copy, add sequence apply, sum, reversed, sorted

Deque refactor, test improvements