Fix an important semicolon

src/vector/index.ts

@@ -23,7 +23,7 @@ limitations under the License.
 // in webpack.config.js
 require('gfm.css/gfm.css');
 require('highlight.js/styles/github.css');
-require('katex/dist/katex.css')
+require('katex/dist/katex.css');
 
 // These are things that can run before the skin loads - be careful not to reference the react-sdk though.
 import {parseQsFromFragment} from "./url_utils";