fix(ws): Move customization_weight as part of message

[ehdsouza]

related to https://github.ibm.com/Watson/SpeechServices/issues/1835

[mediumTaj]

👍 looks good!

[codecov-io]

Codecov Report

Merging #693 into master will decrease coverage by 1.9%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #693      +/-   ##
==========================================
- Coverage   36.22%   34.31%   -1.91%     
==========================================
  Files          24       24              
  Lines       19194    19194              
==========================================
- Hits         6953     6587     -366     
- Misses      12241    12607     +366

Impacted Files	Coverage Δ
ibm_watson/speech_to_text_v1_adapter.py	26.31% <ø> (-52.64%)	⬇️
ibm_watson/text_to_speech_adapter_v1.py	29.41% <0%> (-52.95%)	⬇️
ibm_watson/websocket/synthesize_listener.py	34.04% <0%> (-46.81%)	⬇️
ibm_watson/websocket/recognize_listener.py	24.52% <0%> (-43.4%)	⬇️
ibm_watson/websocket/audio_source.py	42.85% <0%> (-42.86%)	⬇️
...bm_watson/websocket/recognize_abstract_callback.py	52.63% <0%> (-31.58%)	⬇️
ibm_watson/websocket/synthesize_callback.py	52.94% <0%> (-17.65%)	⬇️
ibm_watson/compare_comply_v1.py	27.76% <0%> (-7.57%)	⬇️
ibm_watson/visual_recognition_v3.py	30.09% <0%> (-1.71%)	⬇️
... and 2 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 58d9776...05c7117. Read the comment docs.

[watson-github-bot]

🎉 This PR is included in version 3.4.1 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀