Level 2 Optimization drops multiple transition properties

[wclaibor]

Environment

• clean-css version - npm ls clean-css: -- clean-css@4.2.3
• node.js version - node -v: v12.13.0
• operating system: Windows

Configuration options

var CleanCSS = require('clean-css');
new CleanCSS({
  level: 2
})

Input CSS

.a {
    transition-property: transform, margin-left;
    transition-delay: 0ms;
    transition-duration: 375ms;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

Actual output CSS

.a{transition:transform 375ms cubic-bezier(.4,0,.2,1)}

Expected output CSS

.a {
    transition-property: transform, margin-left;
    transition-delay: 0ms;
    transition-duration: 375ms;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

[jakubpawlowicz]

Sorry it took so long to fix, but it's fixed on main branch, and soon #1135 in v5 release.