v4.6.0

Features

• Add preprocessors to mjml parser - Fixes #42, #874, #457, #459 (thanks @XBeg9)
• Add "inner-background-color" to mj-column to improve gutter. You can set different background-colors for padding and content. Also adds "inner-border" and "inner-border-radius".
• Add "letter-spacing" attribute to mj-button (thanks @milap1296)
• Add "usemap" attribute to mj-image (thanks @vinikira)

Fixes

• Fix #1628 --filePath option accepts directories. Also, fix watch of nested includes when filePath is specified.
• Fix #1670 mj-accordion fallback for Thunderbird (thanks @bertho-zero)
• Fix #1801 dont escape url when "baseUrl" is set on mj-navbar
• Fix mj-group background-color on outlook 2016 - set bgcolor on table (thanks @btd)
• Fix invalid font-size value on p tag on mj-divider (thanks @allentsai93)
• Fix #1848 cli --version alias
• Allow "border-radius" to be percentage or px based on several components (thanks @zslabs)
• Fix http links in code examples (thanks @edjw)
• Multiple documentation improvements (thanks @GarryFlemings, @toantqt, @petetnt, @allanlewis, @davidsneighbour)