Fix option typo

Fixes #77

Author: sindresorhus

index.js

@@ -19,7 +19,7 @@ module.exports = function (pattern, options) {
 		cb(!match);
 	}, {
 		objectMode: true,
-		passthrough: options.passthough !== false,
+		passthrough: options.passthrough !== false,
 		restore: options.restore
 	});
 };

test.js

@@ -222,8 +222,8 @@ describe('filter.restore', function () {
 		streamFilter1.end();
 	});
 
-	it('should end when not using the passthough option', function (cb) {
-		var stream = filter('*.json', {restore: true, passthough: false});
+	it('should end when not using the passthrough option', function (cb) {
+		var stream = filter('*.json', {restore: true, passthrough: false});
 		var restoreStream = stream.restore;
 		var buffer = [];