v0.4.0

What's Changed

• fix: a wide sweep of compat=4 parity gaps by @otnc in #22
• ci: gate on the express compatibility suite by @otnc in #23
• fix: body-parser skip default is a plain {}, not the parser's own empty value by @otnc in #24
• fix: OPTIONS Allow header join differs between Express 4 and 5 by @otnc in #25
• fix: sendFile etag/app setting, explicit byte range, view engine error wording by @otnc in #26
• fix: res.send() legacy 2-arg forms, res.sendfile() relative paths by @otnc in #27
• fix: charset casing regression -- res.set()/res.type() must stay lowercase by @otnc in #28
• fix: req.originalUrl is now the client's literal request-target on Node by @otnc in #29
• fix: res.location('back') alias, compat=4 .js mime type by @otnc in #31
• fix: preserve the real fs error (ENAMETOOLONG etc.) instead of a generic 404 by @otnc in #30
• chore: unwrap mid-sentence line breaks missed in recent comments by @otnc in #33
• chore: pin supertest to the same major real Express's own suite uses by @otnc in #32

Full Changelog: v0.3.0...v0.4.0