Go 1.22+ net/http new features support

[ggicci]

Since go version 1.22+, the native net/http has brought some new features, including:

• Path parameters, e.g. /products/{id}
• Method based routing, e.g. "GET /products/{id}"
• Host based routing, e.g. "example.com/products/{id}"
• ???

[ggicci]

Supporting path parameters is in progress: #113

DONE, see https://github.com/ggicci/httpin/releases/tag/v0.20.0