Update index.js

Co-Authored-By: Mark Wubben <[email protected]>

Author: szmarczak

index.js

@@ -43,7 +43,7 @@ module.exports = ({negotiateProtocol}) => {
 			let valid = false;
 			if (isPlainObject(config)) {
 				const keys = Object.keys(config);
-				if (keys.every(key => key === 'extensions' || key === 'rewritePaths' || 'precompile')) {
+				if (keys.every(key => key === 'extensions' || key === 'rewritePaths' || key === 'precompile')) {
 					valid =
 						(config.extensions === undefined || isValidExtensions(config.extensions)) &&
 						isValidRewritePaths(config.rewritePaths) &&