fix(package): update scratch-sb1-converter to version 0.2.6

package.json

@@ -44,7 +44,7 @@
     "minilog": "3.1.0",
     "nets": "3.2.0",
     "scratch-parser": "4.3.3",
-    "scratch-sb1-converter": "0.2.5",
+    "scratch-sb1-converter": "0.2.6",
     "scratch-translate-extension-languages": "0.0.20181205140428",
     "socket.io-client": "2.0.4",
     "text-encoding": "0.6.4",