Upgrade dependencies

Makefile

@@ -4,15 +4,15 @@ cdnjs=https://cdnjs.cloudflare.com/ajax/libs/
 
 .PHONY: js/vendor css/vendor
 js/vendor:
-	curl -s $(cdnjs)es5-shim/4.5.14/es5-shim.min.js > $@/es5-shim.min.js
-	curl -s $(cdnjs)marked/4.1.1/marked.min.js > $@/marked.min.js
-	curl -s $(cdnjs)dompurify/2.4.0/purify.min.js > $@/purify.min.js
-	curl -s $(cdnjs)KaTeX/0.12.0/katex.min.js > $@/katex.min.js
-	curl -s $(cdnjs)KaTeX/0.12.0/contrib/auto-render.min.js > $@/katex-auto-render.min.js
+	curl -s $(cdnjs)es5-shim/4.6.7/es5-shim.min.js > $@/es5-shim.min.js
+	curl -s $(cdnjs)marked/11.1.1/marked.min.js > $@/marked.min.js
+	curl -s $(cdnjs)dompurify/3.0.8/purify.min.js > $@/purify.min.js
+	curl -s $(cdnjs)KaTeX/0.16.9/katex.min.js > $@/katex.min.js
+	curl -s $(cdnjs)KaTeX/0.16.9/contrib/auto-render.min.js > $@/katex-auto-render.min.js
 	@echo "💫 Manually download prism.min.js from 'https://prismjs.com/download.html#themes=prism&languages=markup+clike+javascript+julia+python+r'"
 
 css/vendor:
-	curl -s $(cdnjs)KaTeX/0.12.0/katex.min.css > $@/katex.min.css
+	curl -s $(cdnjs)KaTeX/0.16.9/katex.min.css > $@/katex.min.css
 	curl -sL https://github.com/KaTeX/katex-fonts/archive/master.zip > katex-fonts.zip
 	rm -rf $@/fonts
 	unzip -j katex-fonts.zip "katex-fonts-master/fonts/*" -d $@/fonts