Fix: Ignore platform requirements when updating lock file

[localheinz]

This PR

• uses clearly unsupported PHP versions in test fixtures
• ignores platform requirements when updating lock file

Related to #465.

[codecov]

Codecov Report

Merging #481 into main will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #481   +/-   ##
=========================================
  Coverage     80.92%   80.92%           
  Complexity       41       41           
=========================================
  Files             4        4           
  Lines           194      194           
=========================================
  Hits            157      157           
  Misses           37       37           

Impacted Files	Coverage Δ	Complexity Δ
src/Command/NormalizeCommand.php	85.54% <ø> (ø)	34.00 <0.00> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 86c553c...9f6cff7. Read the comment docs.