1.3.2

• feat(concurrency): sweep TTL-less keys at startup
• fix(rate_conn): honor sub-minute windows; compute the period on timestamps
• fix(get_limit): a 0 (unlimited) history limit no longer falls through
• fix(concurrency): re-arm the key TTL on decrement to stop a Redis key leak
• fix: guard rate-limit key lookups against unparseable IPs and missing mail
• fix: await background Redis writes so rejections can't crash the process
• fix(getTTL): always return a number; reject unrecognized time units
• fix(getOutDom): optional-chain the fallback domain
• test: refactored against test-fixtures 1.7.0 (#79)