feat(query-typeorm): Support virtual columns in filtering

[TriPSs]

#67

[codecov-commenter]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (4e2aac1) 86.23% compared to head (cb997cf) 86.28%.
Report is 1 commits behind head on master.

Files	Patch %	Lines
.../query-typeorm/src/query/sql-comparison.builder.ts	62.50%	0 Missing and 3 partials ⚠️
...es/query-typeorm/src/query/filter-query.builder.ts	77.77%	0 Missing and 2 partials ⚠️
packages/query-typeorm/src/query/where.builder.ts	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #211      +/-   ##
==========================================
+ Coverage   86.23%   86.28%   +0.05%     
==========================================
  Files         688      688              
  Lines        9750     9765      +15     
  Branches      858      862       +4     
==========================================
+ Hits         8408     8426      +18     
+ Misses        624      619       -5     
- Partials      718      720       +2     

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