Avoid crashing when URL data has unknown WASM version (#13)

Author: edmocosta

web/src/components/playground.js

@@ -103,11 +103,10 @@ export class Playground extends LitElement {
 
   _initState() {
     let urlStateData = this._loadURLBase64DataHash();
-    let version =
-      urlStateData?.version ??
-      (this._versions &&
-        this._versions.length > 0 &&
-        this._versions[0]?.version);
+    let version = urlStateData?.version
+    if (!version || !this._versions?.some(it => it.version === version)) {
+        version = this._versions?.[0]?.version;
+    }
 
     if (urlStateData) {
       this.state = {