1.5.11

Various fixes & improvements

• chore: Bump mypy and fix abstract ContextManager typing (#1421) by @sl0thentr0py
• chore(issues): add link to Sentry support (#1420) by @vladanpaunovic
• fix: replace git.io links with redirect targets (#1412) by @asottile-sentry
• ref: Update error verbose for sentry init (#1361) by @targhs
• fix(sessions): Update session also for non sampled events and change filter order (#1394) by @adinauer