Only try and run the liquid renderer if it's installed, warn otherwise

[david-driscoll]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 15.78947% with 16 lines in your changes missing coverage. Please review.

Project coverage is 7.92%. Comparing base (231f553) to head (7a0eff4).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...ation/ContinuousIntegrationConventionsAttribute.cs	15.78%	16 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #1325      +/-   ##
=========================================
+ Coverage    7.90%   7.92%   +0.02%     
=========================================
  Files         150     150              
  Lines        4163    4165       +2     
  Branches      311     312       +1     
=========================================
+ Hits          329     330       +1     
- Misses       3834    3835       +1     

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