Update chartist.min.js

[Ash-Crow]

Hi,

When trying to install this package in a Django 4 environment with Whitenoise used to manage statics (including js modules installed through npm), we have a failure because one of the example files is referecing a non-existent map file:

       whitenoise.storage.MissingFileError: The file 'chartist-plugin-fill-donut/examples/js/chartist.min.js.map' could not be found with <whitenoise.storage.CompressedManifestStaticFilesStorage object at 0x7f03d0c08f10>.
       The JS file 'chartist-plugin-fill-donut/examples/js/chartist.min.js' references a file which could not be found:
         chartist-plugin-fill-donut/examples/js/chartist.min.js.map

I just removed the reference to the missing file, but it is perhaps possible to entirely remove the examples from the packaged version on npm?