lock dependency versions

platformio.ini

@@ -17,13 +17,11 @@ lib_deps_builtin =
 lib_deps_external =
   sidoh/RF24
   sidoh/WiFiManager#cmidgley
-  ArduinoJson
-  PubSubClient
-  https://github.com/ratkins/RGBConverter
-  Hash
-  WebSockets
-  CircularBuffer
-  ESP8266WebServer
+  ArduinoJson@~5.13.2
+  PubSubClient@~2.7
+  ratkins/RGBConverter@07010f2
+  WebSockets@~2.1.2
+  CircularBuffer@~1.2.0
 extra_scripts =
   pre:.build_web.py
 build_flags = !python .get_version.py -DMQTT_MAX_PACKET_SIZE=200 -DHTTP_UPLOAD_BUFLEN=128 -Idist -Ilib/DataStructures