Fix Social Update

had error in runner:
TypeError: 'dict_keyiterator' object cannot be interpreted as an integer
[...]
in numpy.random.mtrand.RandomState.choice ValueError: a must be 1-dimensional or an integer
File "C:\Users\bigma\PycharmProjects\pycopancore\pycopancore\model_components\exploit_social_learning\implementation\culture.py", line 42, in social_update
    agent_j = np.random.choice(self.acquaintance_network.neighbors(agent_i))
with (self.acquaintance_network.neighbors(agent_i)) being
<dict_keyiterator object at 0x00000226F0049F90>

FIX:
extracting list from key with list()

agent_j = np.random.choice(list(self.acquaintance_network.neighbors(agent_i)))

pycopancore/model_components/exploit_social_learning/implementation/culture.py

@@ -40,7 +40,7 @@ def social_update(self, t):
         # Step (1)
         if self.acquaintance_network.neighbors(agent_i):
             agent_j = np.random.choice(
-                self.acquaintance_network.neighbors(agent_i))
+                list(self.acquaintance_network.neighbors(agent_i)))
             # Step (2): Compare strategies of i and j:
             # If they are the same, do nothing. Else change i's strategy.
             if agent_i.strategy != agent_j.strategy: