Minor refactor & linting support

[azerella]

Just wanted to put some organisation into the codebase and add a typical linting configuration.

Similar to #4 but, this might be a bit more familiar for ma main man @martinshkreli to use going forward ❤️

Notable changes

• Linting support w/ Prettier formatting
• axios instead of fetch to correct a connection timeout issue and as a more usable, industry standard API.
• Promise.all to improve event loop efficiency however, it comes at the cost of now all the tickers will update together.