Deprecated: strlen(): Passing null to parameter in Progress.php

[soulseekah]

Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /vendor/league/climate/src/TerminalObject/Dynamic/Progress.php on line 216

Call Stack:
    0.0003     435200   1. {main}() /view.php:0
    7.6875   16849320   2. League\CLImate\TerminalObject\Dynamic\Progress->advance($increment = ???, $label = ???) /view.php:89
    7.6875   16849320   3. League\CLImate\TerminalObject\Dynamic\Progress->current($current = 15507, $label = NULL) /vendor/league/climate/src/TerminalObject/Dynamic/Progress.php:125
    7.6875   16849320   4. League\CLImate\TerminalObject\Dynamic\Progress->drawProgressBar($current = 15507, $label = NULL) /vendor/league/climate/src/TerminalObject/Dynamic/Progress.php:111
    7.6875   16849352   5. League\CLImate\TerminalObject\Dynamic\Progress->getProgressBar($current = 15507, $label = NULL) /vendor/league/climate/src/TerminalObject/Dynamic/Progress.php:183
    7.6875   16849512   6. strlen($string = NULL) /vendor/league/climate/src/TerminalObject/Dynamic/Progress.php:216

Running on PHP 8.2. Passing in the label to progress calls as an empty string '' fixes the notice.

Related to #190