How to handle autoloading with composer by keeping the WordPress naming conventions?

I’m a bit confused because I’m programming a plugin for WordPress by using composer as it’s the real way to go.

So I’ve created a composer file inside my plugin and some other stuff. In the composer file I’ve added my namespace for autoloading:

"autoload": {
  "psr-4": {
    "Johnny\\Lolkick\\": [
      "includes/classes/"
    ]
  }
}

Inside my classes folder I’ve created now a class with the name class-main.php. I’ve decided to take this name because of the WordPress naming conventions.

The class by itself was named class Main {. Inside my base plugin file I’ve created now a new instance of my class which failed. After changing the file name to Main.php it worked.

So in result the WordPress naming convention broke the autoloading of composer. I want to know now how do you handle this problem? How should I keep the naming convention by using composer?