allow rotate & crop for bitDepth = 1 images

[Fa-b]

rotation of binary images did not fail but instead yielded weird output images.

Also includes:

• add rotate processable check
• fix crop processable check (announced process was 'max' on fail)

[codecov]

Codecov Report

Merging #596 (0e14ce6) into legacy (b3b7499) will increase coverage by 0.85%.
The diff coverage is 96.94%.

@@            Coverage Diff             @@
##           legacy     #596      +/-   ##
==========================================
+ Coverage   83.58%   84.43%   +0.85%     
==========================================
  Files         163      163              
  Lines        5603     5697      +94     
  Branches     1397     1424      +27     
==========================================
+ Hits         4683     4810     +127     
+ Misses        820      790      -30     
+ Partials      100       97       -3     

Impacted Files	Coverage Δ
src/image/transform/rotateFree.js	92.50% <92.45%> (+41.18%)	⬆️
src/image/transform/crop.js	100.00% <100.00%> (+6.66%)	⬆️
src/image/transform/rotate.js	100.00% <100.00%> (+7.31%)	⬆️

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[lpatiny]

Many thanks for your great contribution that looks very well done !

Would it be possible to add some testcases so that we don't have a reduction of the coverage ?

[Fa-b]

@lpatiny I have added some tests as requested