[Snyk] Security upgrade mistune from 0.8.3 to 2.0.3#16

snyk-bot wants to merge 1 commit intomasterrharp/python-goof:masterfrom

snyk-fix-d7eee552b6e42294e7fecf8666cf294drharp/python-goof:snyk-fix-d7eee552b6e42294e7fecf8666cf294dCopy head branch name to clipboard