rollup - fail when typescript has warnings or errors (#154)

Currently this is detected when building the docu. Since the developer
rarely does that the problem is detected on github.
This change allows the developer to discover the error early by failing
the build.

rollup.config.js

@@ -40,6 +40,7 @@ export default [
       }),
       typescript({
         tsconfig: './tsconfig.json',
+        noEmitOnError: true,
       }),
       svg({ base64: true }),
     ],