Fix race condition on task retry (#487)

prep v0.26.1 (#476)

repare for v0.26.0 release

update history to reflect v0.26.0b1

uprev, prepare for release

remove markupsafe

add history for 0.23a1

auto setting version on release

log_redis_info (#255)

* log_redis_info, fix #254

* uprev

* linting and fix CI