To update plugin:

Update readme.md
- update Tested up to
- Add as needed to changelog
- Update the upgrade notice at the bottom

Update cj-tracking.php
- Update CJ_TRACKING_PLUGIN_VERSION
- Update version number in plugin comments

Replace 3.1 in the following (from https://www.parorrey.com/blog/wordpress/publishing-updating-wordpress-plugins-to-svn-repository-via-mac-terminal/):
```
rm -rf /home/russell/projects/code-for-cj-affiliate-network/trunk/*
cd /home/russell/projects/code-for-cj-affiliate-network/tags
cp -R 3.x/* ../trunk/
svn --username=hostingutilities copy https://plugins.svn.wordpress.org/code-for-cj-affiliate-network/trunk https://plugins.svn.wordpress.org/code-for-cj-affiliate-network/tags/3.x -m "tagging version 3.x"
cd ../trunk/
svn add . --force
svn commit --username=hostingutilities . -m "releasing 3.x"
```


what was type is now actionTrackerID but is still stored as type

TODO
- rewrite unit test
- combine woocommerce/legacy_save_affiliate_referral_info with init hook firing in the Gravity Form integration that does the same thing