Fixed AV1522: Skip assignments in 'with' expressions

[bkoelman]

Fixes #132.

[codecov-commenter]

Codecov Report

Merging #133 (e044e52) into master (26d5209) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #133   +/-   ##
=======================================
  Coverage   95.28%   95.28%           
=======================================
  Files          82       82           
  Lines        3965     3968    +3     
=======================================
+ Hits         3778     3781    +3     
  Misses        187      187           

Impacted Files	Coverage Δ
.../AssignEachVariableInASeparateStatementAnalyzer.cs	93.45% <100.00%> (+0.18%)	⬆️

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