why is composer require trying to install a library that isn't a dependency?

When I run composer require greenlion/php-sql-parser I get the following error:

Warning from https://repo.packagist.org: You are using an outdated version of Composer. Composer 2 is now available and you should upgrade. See https://getcomposer.org/2  Using version ^4.4 for greenlion/php-sql-parser  ./composer.json has been updated  Loading composer repositories with package information  Warning from https://repo.packagist.org: You are using an outdated version of Composer. Composer 2 is now available and you should upgrade. See https://getcomposer.org/2  Updating dependencies (including require-dev)  Your requirements could not be resolved to an installable set of packages.      Problem 1      - doctrine/lexer 1.1.0 requires php ^7.2 -> your PHP version (7.1.30) does not satisfy that requirement.      - doctrine/lexer 1.1.0 requires php ^7.2 -> your PHP version (7.1.30) does not satisfy that requirement.      - doctrine/lexer 1.1.0 requires php ^7.2 -> your PHP version (7.1.30) does not satisfy that requirement.      - Installation request for doctrine/lexer (locked at 1.1.0) -> satisfiable by doctrine/lexer[1.1.0].      Installation failed, reverting ./composer.json to its original content.  

I don't understand. https://github.com/greenlion/PHP-SQL-Parser/blob/v4.4.0/composer.json shows that the only dependency is "php" : ">=5.3.2".

Any ideas?

https://stackoverflow.com/questions/67030435/why-is-composer-require-trying-to-install-a-library-that-isnt-a-dependency April 10, 2021 at 11:05AM