fix(storekit1): add storekit 1 methods

[bassrock]

Summary

Pocket's backend only knows about StoreKit 1 for the time being. It seems the receipt that gets saved in the receipt URL area is a storeKit 2 receipt and is not compatible with our backend.

So we need to explcitly create a StoreKit 1 receipt request and send that to our backend.

Implementation Details

• Checked continuations are so cool.

Test Steps

• Test out purchasing and it should succeed.

PR Checklist:

• Added Unit / UI tests
• Self Review (review, clean up, documentation, run tests)
• Basic Self QA

Screenshots

[cyndichin]

code looks good in terms of adding the storeKit 1 method, curious to understand the context of why we are adding them. Do we have to handle cases where receipts were created with StoreKit 1?

[bassrock]

@cyndichin Our server only understands sStoreKit 1, so im explicitly loading a store kit 1 receipt. I dont think StoreKit 2 is working as expected.