Enabling DoQ (DNS-over-QUIC) for Quantumult X on iOS 14 as iOS 14 provides support for quic in libnetwork as private APIs. iOS 13 also includes these APIs, but does not include libquic.dylib in dyld_shared_cache.
Only test on Quantumult X v1.0.31-746 on iOS 14.2.1, 14.5.1, 14.8.
Not fully tested. Use at your own risk.