remove py32 from our test matrix
remove py32 from our test matrix

we're not going to support it going forward

reaperhulk/pynacl,pyca/pynacl,xueyumusic/pynacl,pyca/pynacl,lmctv/pynacl,xueyumusic/pynacl,lmctv/pynacl,reaperhulk/pynacl,reaperhulk/pynacl,lmctv/pynacl,reaperhulk/pynacl,pyca/pynacl,lmctv/pynacl,xueyumusic/pynacl,pyca/pynacl,xueyumusic/pynacl,reaperhulk/pynacl,lmctv/pynacl,pyca/pynacl