Version 4.7.2

1. Improved sentiment module, now default label is ['negative', 'neutral', 'positive'], and use better dataset iterate using active learning, https://malaya.readthedocs.io/en/latest/load-sentiment.html
2. Dataset can get at https://github.com/huseinzol05/malay-dataset/tree/master/sentiment/semisupervised-twitter-3class, label studio labelling for general tweets at https://label.malaysiaai.ml/projects/12/data, label studio labelling for political tweets at https://label.malaysiaai.ml/projects/16/data, get access at https://github.com/malaysia-ai/label-studio#how-to-get-access