ENH: make Furuno reader read WRN110 scn data (format 103)

[kmuehlbauer]

closes #59

[codecov[bot]]

Codecov Report

Merging #65 (adecb7c) into main (bb71414) will decrease coverage by 0.01%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #65      +/-   ##
==========================================
- Coverage   84.83%   84.82%   -0.01%     
==========================================
  Files          18       18              
  Lines        3224     3223       -1     
==========================================
- Hits         2735     2734       -1     
  Misses        489      489              

Flag	Coverage Δ
unittests	84.82% <100.00%> (-0.01%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
xradar/io/backends/cfradial1.py	86.39% <ø> (ø)
xradar/io/backends/gamic.py	86.16% <ø> (ø)
xradar/io/backends/iris.py	79.00% <ø> (ø)
xradar/io/backends/odim.py	88.07% <ø> (ø)
xradar/io/backends/rainbow.py	82.45% <ø> (ø)
xradar/io/backends/furuno.py	89.42% <100.00%> (-0.04%)	:arrow_down:

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[mgrover1]

@kmuehlbauer let me know when this is ready for review!

[kmuehlbauer]

@mgrover1 I'm fine with it now. We might want to rebase merge to have the CI changes in separate commits.

I've adapted to latest black defaults and removed Python=3.8 from the matrix (as xarray etc. are doing).

[mgrover1]

@kmuehlbauer we could also have the version changes it in a separate PR?