Update libraries.json with new entry: nallely (midi library) (#159)

Author: dr-schlange

data/libraries.json

@@ -197,6 +197,15 @@
       "user": "videolabs",
       "repo": "libspatialaudio"
     }
+  },
+   {
+    "name": "Nallely",
+    "description": "Python library meta-synth oriented for scripting your MIDI devices, create virtual modules (LFOs, Envelope Generator, graphical visuals, ...), map all of them together dynamically. Also provides a websocket-bus to create visuals/modules with other languages and a websocket-based protocol to control the core library at run time.",
+    "repository": {
+      "type": "GitHub",
+      "user": "dr-schlange",
+      "repo": "nallely-midi"
+    }
   },
   {
     "name": "NIH-plug",