get_*(): replace httr by httr2?

[dimfalk]

https://github.com/r-lib/httr2

Major differences:

• You can now create and modify a request without performing it. This means that there’s now a single function to perform the request and fetch the result: req_perform(). req_perform() replaces httr::GET(), httr::POST(), httr::DELETE(), and more.

• HTTP errors are automatically converted into R errors. Use req_error() to override the defaults (which turn all 4xx and 5xx responses into errors) or to add additional details to the error message.

• You can automatically retry if the request fails or encounters a transient HTTP error (e.g. a 429 rate limit request). req_retry() defines the maximum number of retries, which errors are transient, and how long to wait between tries.

• OAuth support has been totally overhauled to directly support many more flows and to make it much easier to both customise the built-in flows and to create your own.

• You can manage secrets (often needed for testing) with secret_encrypt() and friends. You can obfuscate mildly confidential data with obfuscate(), preventing it from being scraped from published code.

• You can automatically cache all cacheable results with req_cache(). Relatively few API responses are cacheable, but when they are it typically makes a big difference.

https://httr2.r-lib.org/articles/wrapping-apis.html#secret-management