Version 1.5

1. Available to check deep learning models available for stemming, simply, malaya.stem.available_deep_model().
2. Available to load deep learning model for stemming, simply, malaya.stem.malaya.stem.deep_model(), https://malaya.readthedocs.io/en/latest/Stemmer.html
3. Improve dependency parsing documentation, https://malaya.readthedocs.io/en/latest/Dependency.html#dependency-graph-object