Update/#135/expr for pattern value as entity value

[ltbringer]

resolves #135

[codecov-commenter]

Codecov Report

Merging #138 (451c840) into master (f918961) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #138   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           48        48           
  Lines         2095      2097    +2     
=========================================
+ Hits          2095      2097    +2     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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Impacted Files	Coverage Δ
dialogy/constants/__init__.py	100.00% <100.00%> (ø)
...ialogy/plugins/text/list_entity_plugin/__init__.py	100.00% <100.00%> (ø)

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