v8.4.0

• change the f option from template-file to filter
• change the t template option from boolean to the template-file name to use.
• implement the filter option to specify what to output

the filter option takes up to 4 characters for what to output:

p - output tests that passed (the default)
f - output tests that failed
s - output tests that were skipped
t - output trailing-failed tests only

trailing-failed tests are those tests that fail at the end of the tested range. this is useful in order to see when new versions have been released that the package doesn't yet support.