httr2

[tonyfujs]

This is a re-write of pipr using httr2 under the hood instead of httr. The high-level functions accessible to the end-users have not changed, but the use of httr2 brings some nice new features:

• Automatic local caching of API responses using the PIP API response headers to control the caching behavior
• Automatic handling of retry when hitting the PIP API rate-limiting threshold (currently set to 5 requests per minutes in QA for testing purposes)
• Improved translations of HTTP errors into R error messages
• Two new helper functions have been added to get information about, and delete the local cache

[tonyfujs]

Hello @shahronak47 I think this is ready for review for merging into DEV. Let me know if you have any question. Thanks!

cc @randrescastaneda

[shahronak47]

Hi @tonyfujs , there are some warnings in R CMD CHECK regarding documentation.

Argument items with no description in Rd object 'build_request':
‘...’

Argument items with no description in Rd object 'parse_error_body':
‘resp’

[shahronak47]

Also, I noticed some examples no longer work. I have created an issue here #71