Fix domain validation for subdomains

Full Changelog: v2.4.5...v2.4.7

Scanner Refactor

Full Changelog: v2.4.4...v2.4.5

Overhaul Caching

Implement TLS caching
Switch all JSON encoding to a more performant library
Reduce rate limit to 3 reqs/sec

Full Changelog: v2.4.3...v2.4.4

v2.4.3

Full Changelog: v2.4.2...v2.4.3

Significant DMARC Advice Rework

Full Changelog: v2.4.1...v2.4.2

Accept All API Requests

Full Changelog: v2.4.0...v2.4.1

Latest: TLS checks now follow global timeout

Scans now check that the domain is valid before proceeding
Refactored a few functions to improve readability
Bumped dependency versions
Fixed a couple of non thread-safe operations

Automatic Request Retries + Multiple DKIM Selectors

Full Changelog: v2.3.4...v2.3.5

v2.3.3: Make DNS response buffer size adjustable (#15)

Add `email` as a known DKIM selector (#16)

Support CSV Formatting

Full Changelog: v2.3.1...v2.3.2