Composer: fix provide key #63

Job	Run time
Coding standard (ubuntu-latest, 8.1)	26s
Static analysis (ubuntu-latest, 8.1)	20s
Tests (ubuntu-latest, 7.4, false)	22s
Tests (ubuntu-latest, 8.0, false)	28s
Test for mutants (ubuntu-latest, 8.1)	36s
Tests (ubuntu-latest, 8.1, false)	39s
Tests (macos-latest, 7.4, false)	50s
Tests (macos-latest, 8.0, false)	1m 12s
Tests (macos-latest, 8.1, false)	1m 26s
Tests (windows-latest, 7.4, false)	58s
Tests (windows-latest, 8.0, false)	58s
Tests (windows-latest, 8.1, false)	1m 16s
Tests (ubuntu-latest, 7.4, --prefer-lowest --prefer-stable, false)	23s
Tests (ubuntu-latest, 8.2, --ignore-platform-req=php+, false)	36s
Status check - CI	1s
Code coverage finish (ubuntu-latest, 8.1)	2s
	10m 33s

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