Implementation-of-flip-69

[satyamakgec]

It addresses https://github.com/onflow/flips/blob/fungibleToken-standard-improvement/flips/20230206-fungible-token-vault-type-discovery.md

TODO:

• [ ] Update package.json
• [x] fix js-test framework issue

[joshuahannan]

@satyamakgec You'll need to pull the latest from master before you push your new changes since it is out of date

[satyamakgec]

@joshuahannan latest pull have taken and the return type also changed

[satyamakgec]

May need to fix the Go tests to make the CI happy