Find only cares about last search term

[teschty]

Describe the bug
The --find option only returns items containing the last search term.

The documentation seems to suggest you should be able to use multiple search terms.

To Reproduce

tb --task one two three

tb --find blah blah two
  My Board [0/1]
   10. [ ]  one two three

tb --find two blah blah
(no results)

Expected behavior
I'm uncertain if find is supposed to require all search terms to be present or just require any one search term to be present.

If all search terms are required:

• No results for both searches.

If only one search term is required:

• Both searches should include the added task.

Technical Info (please complete the following information)

• OS: Windows 10
• Node.js Version: v10.8.0
• Taskbook Version: 0.2.0

Additional context
This line appears to check if the search term is the last one in the array, and only sets the result value to a truthy value if it is.