Adding WebP image decoder support

[FitzerIRL]

No description provided.

[codecov]

Codecov Report

Merging #2279 into master will increase coverage by 0.21%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2279      +/-   ##
==========================================
+ Coverage   73.82%   74.04%   +0.21%     
==========================================
  Files         137      137              
  Lines       21432    21431       -1     
==========================================
+ Hits        15823    15869      +46     
+ Misses       5609     5562      -47     

Impacted Files	Coverage Δ
examples/pxScene2d/src/pxScene2d.cpp	73.95% <ø> (-0.07%)	⬇️
src/pxUtil.cpp	75.05% <ø> (+0.11%)	⬆️
src/pxUtil.h	100.00% <ø> (ø)
examples/pxScene2d/src/pxTextBox.cpp	93.01% <0.00%> (+0.54%)	⬆️
examples/pxScene2d/src/pxFont.h	96.38% <0.00%> (+1.20%)	⬆️
src/mac/pxWindowNative.mm	34.01% <0.00%> (+1.26%)	⬆️
examples/pxScene2d/src/Spark.cpp	68.48% <0.00%> (+1.55%)	⬆️
src/mac/pxWindowNative.h	20.00% <0.00%> (+1.81%)	⬆️
... and 3 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6a460fd...a382ba2. Read the comment docs.