Refactor all HTTP requests to use axios

[siddhant1]

As I was working on #521 , we use a package named 'request' which only supports callbacks.
I think we should switch to request-promise alternative.
LInks :- https://github.com/petkaantonov/bluebird
https://github.com/request/request-promise-native

@meiamsome @catarak Should I switch it up?

[catarak]

request-promise is already a dependency, so feel free to refactor accordingly.

[siddhant1]

Cool , I will have a look

[catarak]

There are a bunch of different request libraries used in this project (request, request-promise, axios). Since axios works both client-side and server-side, this project should just use it.

[SundeepChand]

Hello @catarak, can I work on this?

[catarak]

@SundeepChand absolutely! I also think this is a good fit for you since it touches a few files and you're familiar with the codebase.

[SundeepChand]

@catarak, where can I find the Personal Access Token to make requests to the public API? And how can I get EDITOR_API_ACCESS_TOKEN to run fetch-examples-ml5.js