Pre-release: v11.0.0-alpha.0

To add to the confusion, v11 will be v10 with @ts-unit: 20px and new colors,
v12 will be what was v11 until today.

Commits

• [release-it] Split up release commands (dc03291)
• [deps] npm install (37901a5)
• [ts-variables] Fix @ts-lite-liter (16230c5)
• [package] npm install (4f1034f)
• [docs] New colors page (dd81f2a)
• [ts-variables] Mapped colors from v12 (c6dc891)
• [ts-variables] @ts-unit: 20px; (36cc03b)
• [build] Use LESS 3.8.1 (f6f4076)
• [gitignore] Ignore auto-generated ts-runtime.less (853d4e8)