MAINT fixed SciPy version for AppVeyor
MAINT fixed SciPy version for AppVeyor

hmmlearn/hmmlearn,stringertheory/hmmlearn,yunque/hmmlearn,aubreyli/hmmlearn,stringertheory/hmmlearn,hmmlearn/hmmlearn,vchu/hmmlearn,vchu/hmmlearn,aubreyli/hmmlearn,yunque/hmmlearn