fix: add EOL at the end of updated lock files

[hasundue]

• test(lib/file): check EOL at the end of file
• fix: add EOL at the end of updated lock file
• test(cli): stub latest version of jsr:@std/
• test(cli): update snapshot

[codecov]

Codecov Report

Attention: Patch coverage is 68.75000% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 88.01%. Comparing base (23026fd) to head (af30f7e).

Files	Patch %	Lines
lib/file.ts	40.00%	3 Missing ⚠️
lib/lockfile.ts	85.71%	1 Missing ⚠️
lib/testing.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #151      +/-   ##
==========================================
- Coverage   88.35%   88.01%   -0.34%     
==========================================
  Files          20       20              
  Lines        1262     1260       -2     
  Branches      199      199              
==========================================
- Hits         1115     1109       -6     
- Misses        146      150       +4     
  Partials        1        1              

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