test(): fix noop test

Author: dszakallas

lib/trace.spec.js

@@ -182,5 +182,7 @@ describe('Trace', function () {
     expect(noop.reportError).to.be.a('function')
     expect(noop.getTransactionId).to.be.a('function')
     expect(noop.sendMemorySnapshot).to.be.a('function')
+    expect(noop.recordMetric).to.be.a('function')
+    expect(noop.incrementMetric).to.be.a('function')
   })
 })