Bump version to 1.2.1

OttoWinter · web-flow · commit f278522a5961 · 2021-04-11T19:09:48.000+02:00
diff --git a/library.json b/library.json
@@ -12,7 +12,7 @@
     "type": "git",
     "url": "https://github.com/OttoWinter/AsyncTCP.git"
   },
-  "version": "1.2.0",
+  "version": "1.2.1",
   "license": "LGPL-3.0",
   "frameworks": "arduino",
   "platforms": "espressif32",
