Support new Google URLs

[JeffFessler]

This PR is aimed to address #6 by providing a simple function that just adapts the URL appropriately. It also supports downloading into an IO instead of insisting on a file.

If the functions seem OK, then I'll document them. For now this is a RFC...

[flexagoon]

Why aren't you using replace for the link format method?

[JeffFessler]

Why aren't you using replace

Doh, I forgot about it. I will update. But first I need to fix the doc build in a separate PR...

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (cdd05df) 9.87% compared to head (80b4439) 9.87%.

❗ Current head 80b4439 differs from pull request most recent head f0ff7d4. Consider uploading reports for the commit f0ff7d4 to get more accurate results

Additional details and impacted files

@@          Coverage Diff           @@
##           master     #12   +/-   ##
======================================
  Coverage    9.87%   9.87%           
======================================
  Files           1       1           
  Lines          81      81           
======================================
  Hits            8       8           
  Misses         73      73           

Files	Coverage Δ
src/GoogleDrive.jl	9.87% <100.00%> (ø)

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[JeffFessler]

@sjkelly ok, now it uses replace. Comments?

[sjkelly]

Seems good. It was not clear immediately what was the relevant change. In general it makes it easier for review if you rebase, rather than merge FYI.
Also it is good practice to make commits and changes small and related. There are doc string additions here too.

[JeffFessler]

Sorry about my bad git hygiene. Hopefully someday there will be a rebase button in the gui! https://github.com/orgs/community/discussions/22281
I will try to figure out a command line rebase in the future.

Just one comment about the docstring though. I did not actually add a docstring to the function unshortlink if that's the one you were mentioning. If you look at the original code, that docstring was a few blank lines away from the function it was documenting, so had no effect! I just removed those blank lines. It's a bit hard to see in the diff.

[JeffFessler]

I've updated the README now and I will merge tomorrow unless anyone objects before then. The merge will show us the updated README and the Docs (hopefully) and then I can refine if needed before releasing 0.2.
Later someone can remove unneeded code if they want,
but at this stage I just want to add, not deprecate.