php namespace is case-insensitive but autoload_classmap.php's array key is case-sensitive

[coldwinds]

For example:

$vendorDir . '/novutec/domainparser/Parser.php', ); # $parser = new novutec\domainparser\Parser() will fail.

[Seldaek]

As per #1803 this is not going to be supported by Composer, but you will find some workarounds in that issue if fixing your code to be case-sensitive compliant is not an option.