New version 0.2.1

Implementation of the new API releases. The 0.2.1 version includes the following implementations:

• Tweets Sentiment API. It is used with the get_financial_tweets method.
• Cryptocurrency Fundamental Data API. It is used with the get_fundamental_equity method. There is an example in the documentation.
• Minor editions to the documentation.

Do not hesitate to open a new issue if you have any comments or doubts.

Have a great day, and enjoy!