Upgrade NeoPixelBus @ 2.8.4

Author: netmindz

platformio.ini

@@ -403,8 +403,7 @@ build_flagsV5 = -g
 
 lib_depsV5 =
   https://github.com/pbolduc/AsyncTCP.git @ 1.2.0 ;; WLEDMM this must be first in the list, otherwise Aircoookie/ESPAsyncWebServer pulls in an older version of AsyncTCP !!
-  makuna/NeoPixelBus @ 2.7.5
-  ;; makuna/NeoPixelBus @ 2.7.9 ;; experimental
+  makuna/NeoPixelBus @ 2.8.4
   ${common_mm.HUB75_lib_deps}
   ${env.lib_deps}