The verilator 4.100 breaks with some error about C++11 flag.

Wanted to go back to version 4.036
  * Remove the current version: ''brew remove verilator''
  * Go to Homebrew repo dir: ''cd "$(brew --repo homebrew/core)"''
  * Find correct commit: ''git log master -- Formula/verilator.rb''
<code bash>
commit 86447d2239a9ebc4d98607fd4ae5b034d3349c02
Author: BrewTestBot <1589480+BrewTestBot@users.noreply.github.com>
Date:   Tue Jun 9 20:06:50 2020 +0000

    verilator: update 4.036 bottle.
</code>
  * Go back to that certain commit: ''git co 86447d2239a9ebc4d98607fd4ae5b034d3349c02''
  * Then install: ''HOMEBREW_NO_AUTO_UPDATE=1 brew install verilator''
  * And pin this version: ''brew pin verilator''
  * Finally go back to the master branch: ''git co master''