usermods/MY9291: Enable for ESP8266

usermods/MY9291/library.json

@@ -0,0 +1,4 @@
+{
+  "name:": "MY9291",
+  "platforms": ["espressif8266"]
+}

usermods/MY9291/library.json.disabled

@@ -1,3 +0,0 @@
-{
-  "name:": "MY9291"
-}