Log Message:
misc/tailspin: update to 4.0.0

Overview

This release contains several new feature and breaking changes. From a user \ 
perspective, the most notable change is the addition of a JSON highlighter.
From a developer's perspective, the highlighting engine powering tailspin has \ 
been decoupled and extracted into a separate library called \ 
[manifold](https://github.com/bensadeh/manifold).

manifold will still be used internally by tailspin, but it will also be \ 
available as a standalone library for other projects to use.

New features:
 - Added support for handling lines which are valid JSON. tailspin will \ 
recognize if the line is a valid JSON object and highlight it accordingly.
 - Added date and time highlighter for formats like DD/MM/YYYY

Breaking changes:
 - Removed the border from the style from the keyword styling. Instead, the \ 
border will be enabled implicitly by setting a background color for the keyword.
 - Removed date highlighting for formats like Aug 14 and Sun Dec 14 etc. (Can be \ 
re-enabled by adding a custom regex highlighter)
 - One highlighting group for both date and time