kotlin: 1.2.40 -> 1.2.41

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/kotlin/versions.

These checks were done:

- built on NixOS
- ran ‘/nix/store/5byxycv5j3gvwvr87qpv08a7347fxv9q-kotlin-1.2.41/bin/kotlin -h’ got 0 exit code
- ran ‘/nix/store/5byxycv5j3gvwvr87qpv08a7347fxv9q-kotlin-1.2.41/bin/.kotlin-wrapped -h’ got 0 exit code
- found 1.2.41 with grep in /nix/store/5byxycv5j3gvwvr87qpv08a7347fxv9q-kotlin-1.2.41
- directory tree listing: https://gist.github.com/927e0c1e045ca7c165603ae8b1961beb