What is the Keras 2.0 equivalent of `similarity = keras.layers.merge([target, context], mode='cos', dot_axes=0)`
I tried with:
similarity = dot([target, context], axes=1, normalize=True)
Keras 2.0 has removed keras.layers.merge and now we should use keras.layers.Concatenate, 
I was wonder what is the equivalent to having the 'cos' and 'dot_axis=0' arg, for example
similarity = keras.layers.merge([target, context], mode='cos', dot_axes=0) 
How would I write that in keras 2.0?