Add method to retrieve keys in LindiH5pyFile class

[magland]

Fixes #86

[bendichter]

I confirm this works. Could you support client.items() as well?

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 79.46%. Comparing base (731fcb5) to head (24c5371).
Report is 9 commits behind head on main.

Files	Patch %	Lines
lindi/LindiH5pyFile/LindiH5pyFile.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #87      +/-   ##
==========================================
+ Coverage   79.43%   79.46%   +0.02%     
==========================================
  Files          30       30              
  Lines        2256     2269      +13     
==========================================
+ Hits         1792     1803      +11     
- Misses        464      466       +2     

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[magland]

I confirm this works. Could you support client.items() as well?

Yes this is now available. I have merged these into #84 and published as lindi 0.3.14.

(I am publishing that branch before it's actually merged into main because I need it for the newest neurosift/dendro stuff)