added --allow-insecure for matplotlib package
added --allow-insecure for matplotlib package

aerrami/mtools,tomzhang/mtools,parkhyeonghwa/mtools,aerrami/mtools,corymintz/mtools,tomzhang/mtools,ces0712/mtools,devkev/mtools,gormanb/mtools,rueckstiess/mtools,devkev/mtools,yaowenqiang/mtools,corymintz/mtools,corymintz/mtools,parkhyeonghwa/mtools,ces0712/mtools,gormanb/mtools,gormanb/mtools,aerrami/mtools,ces0712/mtools,rueckstiess/mtools,yaowenqiang/mtools,devkev/mtools,parkhyeonghwa/mtools,tomzhang/mtools,yaowenqiang/mtools