add a couple more points to library maintenance

public/docs/ts/latest/cookbook/third-party-lib.jade

@@ -368,11 +368,16 @@ table(width="100%")
   :marked
     ### Be a good library maintainer
 
-    Remember to document your library, 
-    [manage your dependencies properly](appendix-dependency-management),
-    follow [Semantic Versioning](http://semver.org/) and
-    setup a Continuous Integration solution to test your library (included is a `travis.yml` 
+    Now that you've published a library, you need to maintain it as well. 
+    Below are some of the most important points:
+
+    - Keep an eye on the issue tracker.
+    - Document your library.
+    - [Manage your dependencies properly](appendix-dependency-management)
+    - Follow [Semantic Versioning](http://semver.org/)
+    - Setup a Continuous Integration solution to test your library (included is a `travis.yml` 
     file for [Travis CI](https://docs.travis-ci.com/user/getting-started/))!
+    - Choose an [appropriate license](https://choosealicense.com/).
 
 
 .l-main-section