Extended HasValidGettersAndSettersExcludingMatcher by exclusion of asymmetric method accessors

[hsynkrtl]

This PR extends the exclusion capabilities of HasValidGettersAndSettersExcludingMatcher. The new flag excludeAsynmmetricAccessors excludes properties if one of the accessor is missing and circumvents AccessorMissingException.

[codecov]

Codecov Report

Merging #129 (ffec60f) into main (a7a2b69) will increase coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #129      +/-   ##
==========================================
+ Coverage   96.88%   96.96%   +0.08%     
==========================================
  Files          38       38              
  Lines         481      495      +14     
  Branches       44       47       +3     
==========================================
+ Hits          466      480      +14     
  Misses         14       14              
  Partials        1        1              

Impacted Files	Coverage Δ
...a/com/google/code/beanmatchers/BeanOperations.java	77.27% <100.00%> (+2.27%)	⬆️
...ers/HasValidGettersAndSettersExcludingMatcher.java	100.00% <100.00%> (ø)
...in/java/com/google/code/beanmatchers/JavaBean.java	100.00% <100.00%> (ø)

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[orien]

@hsynkrtl Thanks for the pull request. Do you mind updating the PR description? I'd love to understand the problem this change seeks to resolve.