Describe the bug A clear and concise description of what the bug is.

Running black in the console generates a traceback.

To Reproduce Steps to reproduce the behavior:
Running black directly in the console gives me the following traceback.

Traceback (most recent call last):
  File "/Users/jonathan/projects/recorded/integrations/splunk/venv/bin/black", line 7, in <module>

A minimal Travis setup could look like this (requires Rust 1.24.0 or greater):

However, the rustfmt component is only available starting from 1.31.0. Anything below gives:

└─ rustup toolchain add 1.30.0 -c rustfmt
info: syncing channel updates for '1.30.0-x86_64-unknown-linux-gnu'
info: latest update on 2018-10-25, rust version 1.30.0 (da5f414c2 2018-10-24)
error: component 'rustfm

When I try to beautify the i get the following problem
TypeError: Cannot read property 'on' of undefined

I just installed beautify and uncrustify

https://gist.github.com/ODCA117/917affd6b11437517535a45350379820

We need to update our README.md file before the 1.0 release.