v1.6.4

Changelog

bb9679f Merge pull request #191 from dnephin/handle-missing-subtest-pass-event
9ad60eb Merge pull request #192 from dnephin/no-rerun-on-panic
80568f3 Avoid rerun of fialed tests when previous run had a panic
5c6169b Merge pull request #185 from dnephin/fix-no-tests-run-run
68539ea format: handle 'testing: warning: no tests to run' event
e91cbd9 Mitigate gotest bug with missing end events
50d8cb4 Merge pull request #190 from dnephin/print-coverpkg-output
411f958 Fix capturing of coverpkg output