errbot: 5.1.3 -> 5.2.0

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

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

These checks were done:

- built on NixOS
- /nix/store/gfvsdshvr4135r231wzcl2n5if66r0ws-errbot-5.2.0/bin/.errbot-wrapped passed the binary check.
- /nix/store/gfvsdshvr4135r231wzcl2n5if66r0ws-errbot-5.2.0/bin/errbot passed the binary check.
- 2 of 2 passed binary check by having a zero exit code.
- 2 of 2 passed binary check by having the new version present in output.
- found 5.2.0 with grep in /nix/store/gfvsdshvr4135r231wzcl2n5if66r0ws-errbot-5.2.0
- directory tree listing: https://gist.github.com/92be0fef2042d15212f373d23ed09bcf
- du listing: https://gist.github.com/5ca847bd9354551d6e66ba1abc16d23f