don't pass onwarn to compiler itself in Svelte 3 (sveltejs#104)

Conduitry · Conduitry · commit 5cd384f63e08 · 2019-07-12T08:01:48.000-04:00
diff --git a/index.js b/index.js
@@ -18,6 +18,7 @@ const pluginOptions = {
 	emitCss: true,
 
 	// legacy
+	onwarn: true,
 	shared: true,
 	style: true,
 	script: true,
