V0.31.1

k6 v0.31.1 is a patch release with a single bugfix.

The bugfix is about the cloud output and the new http_req_failed metric in k6 v0.31.0. Due to additional state being used for its transport to the k6 cloud, and a misunderstanding of what a functional call from a library dependency does, the http_req_failed values were always set to 1. This did not affect any other output or the end of test summary. (#1908)