Error when ploting in 0.10.0

The below throws `NameError: name 'plot' is not defined` in `igraph 0.10.0`. 
```
g = Graph.DataFrame(pd.DataFrame(list(zip(["1", "2", "3"], ["2","1","1"])), columns = ["src", "des"]) , directed=False, use_vids=False)
fig, ax = plt.subplots(figsize=(10,10))
plot(g, target=ax)
```
