Descriptors parsing and testing

[dr-orlovsky]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 44.30769% with 724 lines in your changes missing coverage. Please review.

Project coverage is 35.7%. Comparing base (893fc91) to head (efb96d5).

Files with missing lines	Patch %	Lines
descriptors/src/script.rs	1.3%	376 Missing ⚠️
descriptors/src/multisig.rs	29.4%	132 Missing ⚠️
descriptors/src/compiler/compile.rs	78.2%	67 Missing ⚠️
descriptors/src/descriptor.rs	23.3%	66 Missing ⚠️
descriptors/src/compiler/parser.rs	77.6%	47 Missing ⚠️
descriptors/src/tr.rs	30.4%	32 Missing ⚠️
descriptors/src/compiler/lexer.rs	95.1%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           master     #62     +/-   ##
========================================
+ Coverage    31.4%   35.7%   +4.3%     
========================================
  Files          26      29      +3     
  Lines        5706    6864   +1158     
========================================
+ Hits         1792    2448    +656     
- Misses       3914    4416    +502     

Flag	Coverage Δ
rust	35.7% <44.3%> (+4.3%)	⬆️

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