Update to last reveal.js 4.2.1 (#148)
diff --git a/inst/reveal.js-4.2.1/plugin/math/plugin.js b/inst/reveal.js-4.2.1/plugin/math/plugin.js
new file mode 100644
index 0000000..a92ccfb
--- /dev/null
+++ b/inst/reveal.js-4.2.1/plugin/math/plugin.js
@@ -0,0 +1,15 @@
+import {KaTeX} from "./katex";
+import {MathJax2} from "./mathjax2";
+import {MathJax3} from "./mathjax3";
+
+const defaultTypesetter = MathJax2;
+
+/*!
+ * This plugin is a wrapper for the MathJax2,
+ * MathJax3 and KaTeX typesetter plugins.
+ */
+export default Plugin = Object.assign( defaultTypesetter(), {
+ KaTeX,
+ MathJax2,
+ MathJax3
+} );
\ No newline at end of file