prevent replacing background-position:0 with background-position:0 0 when "minifying" CSS...

lib/single-file/css-minifier.js

@@ -394,7 +394,7 @@ this.cssMinifier = this.cssMinifier || (() => {
 	const REGEXP_REPLACE_4_ZEROS = /:0 0 0 0(;|\})/g;
 	const REGEXP_REPLACE_3_ZEROS = /:0 0 0(;|\})/g;
 	const REGEXP_REPLACE_2_ZEROS = /:0 0(;|\})/g;
-	const REGEXP_REPLACE_1_ZERO = /(background-position|transform-origin|webkit-transform-origin|moz-transform-origin|o-transform-origin|ms-transform-origin|box-shadow):0(;|\})/gi;
+	const REGEXP_REPLACE_1_ZERO = /(transform-origin|webkit-transform-origin|moz-transform-origin|o-transform-origin|ms-transform-origin|box-shadow):0(;|\})/gi;
 	const REGEXP_REPLACE_ZERO_DOT_DECIMAL = /(:|\s)0+\.(\d+)/g;
 	const REGEXP_REPLACE_RGB = /rgb\s*\(\s*([0-9,\s]+)\s*\)/gi;
 	const REGEXP_REPLACE_BORDER_ZERO = /(border|border-top|border-right|border-bottom|border-left|outline|background):none(;|\})/gi;