* fix[workflow]: multiple fixes for workflow/matrix
fix[workflow]: default `max-parallel`
fix[workflow]: default `fail-fast`, it's `true`, not `false`
fix[workflow]: skipping over the job when `strategy:` is defined but `matrix:` isn't (fixes#625)
fix[workflow]: skip non-existing includes keys and hard fail on non-existing excludes keys
fix[workflow]: simplify Matrix decode (because I "think" I know how `yaml` works) (fixes#760)
fix[tests]: add test for planner and runner
* fix(workflow): use yaml node for env key
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
