Fix error caused by weakly referenced package not specifying version …

[loonghao]

This PR is try to fix #1711

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 58.29%. Comparing base (9610630) to head (341eb1f).

❗ Current head 341eb1f differs from pull request most recent head 75dd459. Consider uploading reports for the commit 75dd459 to get more accurate results

Files	Patch %	Lines
src/rez/package_order.py	71.42%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1712      +/-   ##
==========================================
+ Coverage   58.27%   58.29%   +0.01%     
==========================================
  Files         126      126              
  Lines       17157    17159       +2     
  Branches     3504     3505       +1     
==========================================
+ Hits         9998    10002       +4     
+ Misses       6494     6493       -1     
+ Partials      665      664       -1     

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[JeanChristopheMorinPerso]

@loonghao Thanks for creating this PR. Do you think you could add a test for these lines: https://github.com/AcademySoftwareFoundation/rez/pull/1712/files#diff-1ad6984e6ce49221a86620d55092bacae0b32b2d6c9401295c655c9d3e72a1a0R443-R446?

[loonghao]

@loonghao Thanks for creating this PR. Do you think you could add a test for these lines: https://github.com/AcademySoftwareFoundation/rez/pull/1712/files#diff-1ad6984e6ce49221a86620d55092bacae0b32b2d6c9401295c655c9d3e72a1a0R443-R446?

@JeanChristopheMorinPerso
I adjusted some tests and found that I still couldn't cover these lines of code.
I think since they are all expected they won't raise a TypeError, I removed the update on these lines.

[JeanChristopheMorinPerso]

Thank you @loonghao and @isohedronpipeline!