Missing <stdexcept> include

[blinard-BIOINFO]

@nromashchenko

v0.3.1

In file included from xpas/src/xpas/phylo_tree.cpp:2:
xpas/include/xpas/phylo_tree.h: In constructor ‘xpas::visit_subtree<Iterator, Const>::visit_subtree(xpas::visit_subtree<Iterator, Const>::pointer)’: xpas/include/xpas/phylo_tree.h:293:28: error: ‘runtime_error’ is not a member of ‘std’
293 |  throw std::runtime_error("xpas::visit_subtree: root can not be null");

Fresh install of Clion, fresh clone of xpas repository.
#include <stdexcept> needs to be added in xpas/src/xpas/phylo_tree.cpp otherwise the error above is throwed at compilation.

This appears to be new ? I never got this error on previous fresh installations.

[nromashchenko]

Fixed in v0.5.1