Update for changes in remark (#22)

src/components/section.js

@@ -12,7 +12,7 @@ function renderHighlighted(nodes) {
       .stringify(remark()
         .use(remarkHighlight)
         .use(remarkPlugins)
-        .run({
+        .runSync({
           type: 'root',
           children: nodes
         })))

src/index.js

@@ -8,7 +8,7 @@ import content from './custom/content';
 
 var ast = remark()
   .use(slug)
-  .run(remark().parse(content));
+  .runSync(remark().parse(content));
 
 ReactDOM.render(
   <App ast={ast} content={content} />,

src/render.js

@@ -8,7 +8,7 @@ import fs from 'fs';
 
 var ast = remark()
   .use(slug)
-  .run(remark().parse(content));
+  .runSync(remark().parse(content));
 
 var template = fs.readFileSync('./index.html', 'utf8');