fix twisted version, fix taker test

jmbase/setup.py

@@ -9,5 +9,5 @@ setup(name='joinmarketbase',
       author_email='ekaggata@gmail.com',
       license='GPL',
       packages=['jmbase'],
-      install_requires=['twisted',],
+      install_requires=['twisted==16.6.0',],
       zip_safe=False)

jmclient/test/test_taker.py

@@ -59,7 +59,7 @@ class DummyWallet(AbstractWallet):
 def dummy_order_chooser():
     return t_chosen_orders
 
-def taker_finished(res, fromtx=False, waittime=0):
+def taker_finished(res, fromtx=False, waittime=0, txdetails=None):
     print("called taker finished callback")
 
 def dummy_filter_orderbook(orders_fees, cjamount):