v2.0.0: Merge pull request #5 from semji/build/2.0.0

• Fix licence
• Add Dev tools to improve DX
• Refactor and improve code readability
• Improve performance by using native function and local caching

v1.0.1: Merge pull request #2 from semji/fix/tokenizer_repeted_content

• Fix issue when duplicated terms are tokenized

v1.0.0: Merge pull request #1 from semji/improve/encoder

• Fork from https://github.com/CodeRevolutionPlugins/GPT-3-Encoder-PHP
• Use Object structuration