v0.5.1

What's Changed

• fix: honour RFC 9110 precedence in Accept negotiation (q=0) by @otnc in #73
• fix: XML builder safety (boolean attrs, validated custom names) by @otnc in #74
• fix: conditional request handling per RFC 9110 by @otnc in #75
• fix: xmlns:content declaration matches the actual content:encoded gate by @otnc in #76
• fix: parseAccept respects quoted-string boundaries by @otnc in #77

Full Changelog: v0.5.0...v0.5.1