Fix CI docker test

Change-Id: I4e0f9191337c46ee13b6b3244c9df46e8f47a1af
diff --git a/src/index.js b/src/index.js
index cd7f11f..1a368fb 100755
--- a/src/index.js
+++ b/src/index.js
@@ -42,7 +42,7 @@
 if (options.help) {
   const usage = getUsage(sections);
   console.log(usage);
-  process.exit(1);
+  process.exit(0);
 }
 
 const EmojiRegex = require('emoji-regex');