bug #175 ensure Php73 class is loaded for bootstrap (baohx2000)
bug #175 ensure Php73 class is loaded for bootstrap (baohx2000)

This PR was squashed before being merged into the 1.11-dev branch (closes #175).

Discussion
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ensure Php73 class is loaded for bootstrap

Some composer plugins (like monorepo) will cause files to be loaded before the autoloader is fully registered, so class files must be manually loaded

Commits
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4fdd5d7 ensure Php73 class is loaded for bootstrap

symfony/polyfill,nicolas-grekas/polyfill