Allow extension-installer #168

Job	Run time
Quality control	39s
Linter	1m 19s
Security checks	18s
Cleanup artifacts	0s
Unit tests, PHP ${{ matrix.php-versions }}, ${{ matrix.operating-system }}	0s
Code coverage	0s
Unit tests, PHP ${{ matrix.php-versions }}, ${{ matrix.operating-system }}	0s
	2m 16s

Provide feedback