BUG: Ensure 'rio.bounds' ordered correctly

[snowman2]

• [x] Closes #545
• [x] Tests added
• [x] Fully documented, including docs/history.rst for all changes and docs/rioxarray.rst for new API

[codecov[bot]]

Codecov Report

Merging #560 (b3d9781) into master (f9ce51e) will increase coverage by 0.01%. The diff coverage is 89.47%.

@@            Coverage Diff             @@
##           master     #560      +/-   ##
==========================================
+ Coverage   96.22%   96.24%   +0.01%     
==========================================
  Files          13       13              
  Lines        1591     1596       +5     
==========================================
+ Hits         1531     1536       +5     
  Misses         60       60              

Impacted Files	Coverage Δ
rioxarray/rioxarray.py	96.58% <87.50%> (-0.36%)	:arrow_down:
rioxarray/raster_array.py	97.73% <100.00%> (+0.56%)	:arrow_up:

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.