Test error on Numpy 1.12.0 due tinyarray.dtype not having a type attribute

Hey,

I've recently decided to package also the development versions of Kwant for Arch, since it would make playing around with it a bit easier for me and might also interessant other people. I just finished my buildscript, but I just gut a failure of the test suite for assert_array_compare

E               AssertionError: 
E               Arrays are not almost equal to 13 decimals
E                ACTUAL: array([(-0+0j), (-5.5+2.75j)])
E                DESIRED: array([ 0.0+0.j  , -5.5+2.75j])

As an error this is not too scary, but it might be a good idea to setup up CI for tinyarray as well.