{space,tab}-validator will returns success at empty indented line

src/validation/space/space-validator.js

@@ -9,7 +9,7 @@ const validate = (line, lineNumber, editorconfig) => {
 			}
 		}
 
-		if (!line.match(/^ *[^\s]+/)) {
+		if (!line.match(/^ *[\S\r\n]+/)) {
 			return `${lineNumber}: Mixed indentation (only spaces expected)`;
 		}
 	}

src/validation/tab/tab-validator.js

@@ -2,7 +2,7 @@ const validate = (line, lineNumber, editorconfig) => {
 	if (line.length > 0 && editorconfig.indent_style === 'tab') {
 		// Starts with tab character * (none, one or more)
 		// and everything but whitespace or space and * (block comment)
-		if (!line.match(/^\t*([^\s]+| \*)/)) {
+		if (!line.match(/^\t*([\S\r\n]+| \*)/)) {
 			return `${lineNumber}: Mixed indentation (only tabs expected)`;
 		}
 	}