don't replace "0s" because it's too risky

lib/single-file/vendor/css-minifier.js

@@ -384,7 +384,7 @@ this.cssMinifier = this.cssMinifier || (() => {
 	const REGEXP_RESTORE_SPACE3 = /\bor\(/gi;
 	const REGEXP_REMOVE_SPACES3 = /([!{}:;>+([,])\s+/g;
 	const REGEXP_REMOVE_SEMI_COLUMNS = /;+\}/g;
-	const REGEXP_REPLACE_ZERO = /(^|[^.0-9\\])(?:0?\.)?0(?:ex|ch|r?em|vw|vh|vmin|vmax|cm|mm|in|pt|pc|px|deg|g?rad|turn|m?s|k?Hz|dpi|dpcm|dppx|%)(?![a-z0-9])/gi;
+	const REGEXP_REPLACE_ZERO = /(^|[^.0-9\\])(?:0?\.)?0(?:ex|ch|r?em|vw|vh|vmin|vmax|cm|mm|in|pt|pc|px|deg|g?rad|turn|ms|k?Hz|dpi|dpcm|dppx|%)(?![a-z0-9])/gi;
 	const REGEXP_REPLACE_ZERO_DOT = /([0-9])\.0(ex|ch|r?em|vw|vh|vmin|vmax|cm|mm|in|pt|pc|px|deg|g?rad|turn|m?s|k?Hz|dpi|dpcm|dppx|%| |;)/gi;
 	const REGEXP_REPLACE_4_ZEROS = /:0 0 0 0(;|\})/g;
 	const REGEXP_REPLACE_3_ZEROS = /:0 0 0(;|\})/g;