Merge branch 'Melanosuchus/modernize' into Melanosuchus/cmake

diff --cc libs/container/hashtable.h
index 0f174d20e87b813d27ac9cd983b161d0ffa54867,1deb231ef09952c37d673de1094e2a5534602bf1..6b16bd60b8091092bf650ffabebea3aed1954a1d
--- 1/libs/container/hashtable.h
--- 2/libs/container/hashtable.h
+++ b/libs/container/hashtable.h
@@@ -25,10 -31,8 +31,9 @@@ template<typename Key, typename Value, 
  #include <cstddef>
  #include <algorithm>
  #include <functional>
 +#include <memory>
  #include "debugging/debugging.h"
  
- 
  namespace HashTableDetail
  {
  inline std::size_t next_power_of_two( std::size_t size ){