Fails to build with GCC 10: ‘uint64_t’ does not name a type

[bertogg]

Hi, while building this with GCC 10 I found the following error:

In file included from src/multipath_alignment_graph.hpp:15,
                 from src/multipath_alignment_graph.cpp:5:
include/structures/rank_pairing_heap.hpp:114:5: error: ‘uint64_t’ does not name a type; did you mean ‘u_int64_t’?
  114 |     uint64_t rank = 0;
      |     ^~~~~~~~
      |     u_int64_t

It looks like src/include/structures/rank_pairing_heap.hpp is missing an #include <cstdint>, which is where uint64_t and friends are defined.