Make log level less strictly expected from psr log

[JoshuaBehrens]

Description

Running the 0.7.2 with -vvv fails:

 Uncaught TypeError: Argument 1 passed to Icanhazstring\Composer\Unused\Log\DebugLogger::buildRecord() must be of the type int, string given, called in vendor/icanhazstring/composer-unused/src/Log/DebugLogger.php on line 33 and defined in vendor/icanhazstring/composer-unused/src/Log/DebugLogger.php:44
Stack trace:
#0 vendor/icanhazstring/composer-unused/src/Log/DebugLogger.php(33): Icanhazstring\Composer\Unused\Log\DebugLogger->buildRecord('info', 'version', Array)
#1 phar:///usr/local/bin/composer/vendor/psr/log/Psr/Log/LoggerTrait.php(114): Icanhazstring\Composer\Unused\Log\DebugLogger->log('info', 'version', Array)
#2 vendor/icanhazstring/composer-unused/src/Command/UnusedCommand.php(274): Icanhazstring\Composer\Unused\Log\DebugLogger->info('version', Array)
#3 in vendor/icanhazstring/composer-unused/src/Log/DebugLogger.php on line 44

That is due to the constants exposed from psr/log are strings

<?php

namespace Psr\Log;

/**
 * Describes log levels.
 */
class LogLevel
{
    const EMERGENCY = 'emergency';
    const ALERT     = 'alert';
    const CRITICAL  = 'critical';
    const ERROR     = 'error';
    const WARNING   = 'warning';
    const NOTICE    = 'notice';
    const INFO      = 'info';
    const DEBUG     = 'debug';
}

The psr logger interface expects mixed levels:

<?php

namespace Psr\Log;

/**
 * Describes a logger instance.
 *
 * The message MUST be a string or object implementing __toString().
 *
 * The message MAY contain placeholders in the form: {foo} where foo
 * will be replaced by the context data in key "foo".
 *
 * The context array can contain arbitrary data. The only assumption that
 * can be made by implementors is that if an Exception instance is given
 * to produce a stack trace, it MUST be in a key named "exception".
 *
 * See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md
 * for the full interface specification.
 */
interface LoggerInterface
{
    /**
     * [...]
     */

    /**
     * Logs with an arbitrary level.
     *
     * @param mixed   $level
     * @param string  $message
     * @param mixed[] $context
     *
     * @return void
     *
     * @throws \Psr\Log\InvalidArgumentException
     */
    public function log($level, $message, array $context = array());
}

And the debug logger builds records expecting the level to be an int.

Checklist

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully ran tests with your changes locally?

[icanhazstring]

Hi @JoshuaBehrens thanks for the contribution 👍
Could you rebase with origin/master as I removed a phpstan complain about one check and also added some more workflow checks.

If this works out we can get this merged 🚀

[JoshuaBehrens]

Rebase is out

[icanhazstring]

Nice. Thank you. Merged 👍

[JoshuaBehrens]

Damn you are a very fast at reacting :) I like