Add time_series_intraday_extended

[radonnachie]

I duplicated and modified time_series_intraday to provide access to the EXTENDED function.

TODO is add to the test suite. Simple inclusion in the existing time_series tests resulted in failures.

[dm13450]

@RocketRoss Do the tests pass when you run locally?
I think all the CI tests will fail when pushed because the different versions are run in parallel and overload the API.

[radonnachie]

I believe so.. All of the pre-existing tests pass, except in cases where my free API limit has been reached:

fx_intraday: Test Failed at D:\Development\OpenSource\julia\dev\AlphaVantage\test\foreign_exchange_curency_test.jl:12
  Expression: length(data) === 2
   Evaluated: 1 === 2

[dm13450]

Ok great, just add your test function (even if it fails) and I'll deal with the API limits

[radonnachie]

Issue was that the extended function doesn't seem to take kindly to datatype=json. Fixed and added test, which passes.

[ellisvalentiner]

Tests don't pass because of too many calls to the API.

I was playing around with Base.retry but didn't have time to get it implemented.

If the tests pass for one of the jobs in the matrix then it is probably good to go.

[dm13450]

The new tests passed in some of the jobs, so I've merged.

[radonnachie]

The failed tests seem to be related to Julia's version. Perhaps the new function's use of some regex to validate arguments is enabled by recent developments in Julia.