[typescript][enhancement]: Update typescript definitions to match the latest SDK v3.0.2

[abisalehalliprasan]

Hacktoberfest is underway right now and we would love for you to contribute 🚀 . More information on #hacktoberfest is here

Develop-with-Intuit for Hacktoberfest

Problem

Update typescript definitions file to match the latest SDK v3.0.2
Ref : index.d.ts file

Fix Needed

Add the missing API typings ( interfaces/classes ) into the definition file ( index.d.ts )

You can compare using the latest SDK version v3.0.2

Instructions to use the sample app

In order to test the typings locally from the sample project, you'll need to link the intuit-oauth package with yarn or npm.

# Link local intuit-oauth branch with typings support to sample typescript project
yarn link
cd sample/typescript
yarn link intuit-oauth

PR Guidelines

Kindly follow the below instructions to submit your PR :

• Fork and clone the repository (typescript branch).
• Run npm install for dependencies.
• Test all your changes.
• Run npm test to execute all specs.

Once ready, please submit a PR to the typescript branch here.
Note : PR's will be merged to the master branch once all the testing is completed.

[shlok-kothari]

Hi @abisalehalliprasan I would like to take a shot at this

[abisalehalliprasan]

@shlok-kothari : Awesome. Go for it. 👍

[barakplasma]

since this was merged, I suggest closing this issue.
By the way, since release 4.0 happened, have the typescript definitions been updated since then? @abisalehalliprasan