Upgrade KaTeX. Fixes #109.

Author: mbostock

Diff for: src/tex.js

@@ -14,8 +14,8 @@ function style(href) {
 export default function(require) {
   return function() {
     return Promise.all([
-      require("@observablehq/katex@0.10.2/dist/katex.min.js"),
-      require.resolve("@observablehq/katex@0.10.2/dist/katex.min.css").then(style)
+      require("@observablehq/katex@0.11.0/dist/katex.min.js"),
+      require.resolve("@observablehq/katex@0.11.0/dist/katex.min.css").then(style)
     ]).then(function(values) {
       var katex = values[0], tex = renderer();