fix best-version determination for versions >9

diff --git a/lib/mystery-box.js b/lib/mystery-box.js
index c7ddf187ea64eed920ac2c3a772310b83af4cbf5..080bc174dc35938cd19101d9eacc3637402d5827 100644 (file)
--- a/lib/mystery-box.js
+++ b/lib/mystery-box.js
@@ -98,7 +98,7 @@ class MysteryBox extends EventEmitter {
     }, {});
 
     // Default to highest
-    this.bestVersion = Number(Object.keys(this.versionParameters).sort().pop());
+    this.bestVersion = Number(Object.keys(this.versionParameters).sort((a, b) => a - b).pop());
     if (Number.isNaN(this.bestVersion)) {
       throw new MysteryBoxError('no supported versions available');
     }