Use Composer\InstalledVersions to retrieve the installed version

[sj-i]

Following the recommendation from @sasezaki at #366

Backporting #368

[github-actions]

Pull Request Test Coverage Report for Build 7000858183

Warning: This coverage report may be inaccurate.

We've detected an issue with your CI configuration that might affect the accuracy of this pull request's coverage report.
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A quick fix for this PR: rebase it; your next report should be accurate.

• 0 of 2 (0.0%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.01%) to 83.029%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/ReliProfiler.php	0	2	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/Lib/PhpProcessReader/PhpZendMemoryManagerChunkFinder.php	1	83.33%

Totals
Change from base Build 7000572053:	-0.01%
Covered Lines:	4868
Relevant Lines:	5863

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💛 - Coveralls