Update unit test for writing to console when no out dir specified

Author: Jonathan Spruance (Insight Global)

packages/chatdown/test/commands/chatdown.test.ts

@@ -45,7 +45,7 @@ describe('chatdown', () => {
 
     it('should read from file when chat file is passed as an argument', done => {
         cp.exec(`node ./bin/run chatdown --in ./test/utils/cli.sample.chat`, (error, stdout) => {
-            assert(stdout.includes('Successfully wrote'));
+            assert.doesNotThrow(() => JSON.parse(stdout));
             done();
         });
     });