Include arm64 in supported architectures
Include arm64 in supported architectures

isaacroldan/MMMarkdown,albertbori/MMMarkdown,isaacroldan/AttributedMarkdown,cnbin/MMMarkdown,mjzac/MMMarkdown,AgileBits/MMMarkdown,iosdev-republicofapps/MMMarkdown,isaacroldan/AttributedMarkdown,jonesgithub/MMMarkdown,albertbori/MMMarkdown,mobilejazz/MMMarkdown,albertbori/MMMarkdown,gonefish/MMMarkdown,1aurabrown/MMMarkdown,babbage/MMMarkdown,mdiep/MMMarkdown,cnbin/MMMarkdown,isaacroldan/MMMarkdown,isaacroldan/AttributedMarkdown,gonefish/MMMarkdown,1aurabrown/MMMarkdown,iosdev-republicofapps/MMMarkdown,jonesgithub/MMMarkdown,mobilejazz/MMMarkdown,mjzac/MMMarkdown,isaacroldan/AttributedMarkdown,mdiep/MMMarkdown,AgileBits/MMMarkdown,babbage/MMMarkdown,isaacroldan/AttributedMarkdown