Update version for release

TMRh20 · web-flow · commit 4c6c106f2dcf · 2020-08-01T03:07:53.000-06:00
diff --git a/library.json b/library.json
@@ -6,7 +6,7 @@
     "type": "git",
     "url": "https://github.com/nRF24/RF24.git"
   },
-  "version": "1.3.6",
+  "version": "1.3.7",
   "frameworks": "arduino",
   "platforms": [
     "atmelavr",
