Update README.md

this still doesn't work. see node-red#25

README.md

@@ -190,7 +190,7 @@ describe('if `omg` in input message', function () {
       const n1 = helper.getNode('n1')
       n1.receive({omg: true});
       n1.on('input', () => {
-        n1.warn.should.be.calledWithExactly('lolwtf');
+        n1.error.should.be.calledWithExactly('lolwtf');
         done();
       });
     });
@@ -361,4 +361,4 @@ var logEvents = helper.log().args.filter(function(evt {
 
     npm run examples
 
-This runs tests on an included lower-case node (as above) as well as snaphots of some of the core nodes' Javascript files to ensure the helper is working as expected.
+This runs tests on an included lower-case node (as above) as well as snaphots of some of the core nodes' Javascript files to ensure the helper is working as expected.