Added package xio (#1633)

packages.json

@@ -1,11 +1,11 @@
-[ 
+[
   {
     "name": "nimbitarray",
     "url": "https://github.com/YesDrX/bitarray",
     "method": "git",
     "tags": [
       "bitarray",
-       "nim"
+      "nim"
     ],
     "description": "A simple bitarray library for nim.",
     "license": "MIT",
@@ -19480,5 +19480,18 @@
     "description": "Prebuilt components for the Fidget GUI library.",
     "license": "MIT",
     "web": "https://github.com/Knaque/spinner"
+  },
+  {
+    "name": "xio",
+    "url": "https://github.com/xflywind/async",
+    "method": "git",
+    "tags": [
+      "net",
+      "os",
+      "prologue"
+    ],
+    "description": "Cross platform system API for os and net.",
+    "license": "Apache-2.0",
+    "web": "https://github.com/xflywind/async"
   }
 ]