2.2.0

Release log:

Update: composer package and code cleanup.
Fixes:
- Missing associated attributes if parent is skipped by empty columns.
- Add unique sql key on feed configuration table to prevent duplicate records.
- Do not upload test files on FTP accounts.
- Add directive to output Tier Price.
- Currency selector to follow selected store currencies after saving.
- Improved feed URL to work with linked root directory and detect usage of pub folder.
- Exclude products from disabled categories when set with Include products w/o category = No