Propose Go 1.23 as minimum required version due to getkin/kin-openapi dependency changes

[uh-zz]

Overview

I would like to propose updating the minimum required Go version to 1.23 due to updates in getkin/kin-openapi.
#20

I have confirmed that tests are failing in the above CI because Go 1.20 doesn't support the toolchain.

I've also confirmed that oapi-codegen/oapi-codegen will address this soon:
oapi-codegen/oapi-codegen#1890

Why

In the following version of getkin/kin-openapi, the dependency invopop/yaml was removed:
https://github.com/getkin/kin-openapi/releases/tag/v0.129.0

As a result, I've confirmed that when importing both the latest version of getkin/kin-openapi and oapi-codegen/echo-middleware on the host side, the IDE shows errors.

go.mod

module path/to/module

go 1.24.3

require (
	github.com/getkin/kin-openapi v0.132.0
	github.com/go-playground/validator v9.31.0+incompatible
	github.com/labstack/echo/v4 v4.13.3
	github.com/oapi-codegen/echo-middleware v1.0.2
	github.com/oapi-codegen/oapi-codegen/v2 v2.4.1
	github.com/oapi-codegen/runtime v1.1.1
)

require (
	github.com/apapsch/go-jsonmerge/v2 v2.0.0 // indirect
	github.com/dprotaso/go-yit v0.0.0-20220510233725-9ba8df137936 // indirect
	github.com/go-openapi/jsonpointer v0.21.0 // indirect
	github.com/go-openapi/swag v0.23.0 // indirect
	github.com/go-playground/locales v0.14.1 // indirect
	github.com/go-playground/universal-translator v0.18.1 // indirect
	github.com/google/uuid v1.5.0 // indirect
	github.com/gorilla/mux v1.8.1 // indirect
	github.com/josharian/intern v1.0.0 // indirect
	github.com/labstack/gommon v0.4.2 // indirect
	github.com/leodido/go-urn v1.2.4 // indirect
	github.com/mailru/easyjson v0.7.7 // indirect
	github.com/mattn/go-colorable v0.1.13 // indirect
	github.com/mattn/go-isatty v0.0.20 // indirect
	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 // indirect
	github.com/oasdiff/yaml v0.0.0-20250309154309-f31be36b4037 // indirect
	github.com/oasdiff/yaml3 v0.0.0-20250309153720-d2182401db90 // indirect
	github.com/perimeterx/marshmallow v1.1.5 // indirect
	github.com/rogpeppe/go-internal v1.14.1 // indirect
	github.com/speakeasy-api/openapi-overlay v0.9.0 // indirect
	github.com/valyala/bytebufferpool v1.0.0 // indirect
	github.com/valyala/fasttemplate v1.2.2 // indirect
	github.com/vmware-labs/yaml-jsonpath v0.3.2 // indirect
	golang.org/x/crypto v0.31.0 // indirect
	golang.org/x/mod v0.21.0 // indirect
	golang.org/x/net v0.33.0 // indirect
	golang.org/x/sync v0.10.0 // indirect
	golang.org/x/sys v0.28.0 // indirect
	golang.org/x/text v0.21.0 // indirect
	golang.org/x/time v0.8.0 // indirect
	golang.org/x/tools v0.26.0 // indirect
	gopkg.in/go-playground/assert.v1 v1.2.1 // indirect
	gopkg.in/yaml.v2 v2.4.0 // indirect
	gopkg.in/yaml.v3 v3.0.1 // indirect
)

Error Messge

error while importing github.com/getkin/kin-openapi/openapi3: code in directory /path/to/vendor/github.com/oasdiff/yaml expects import "github.com/invopop/yaml"compiler

I have confirmed that compilation executes without issues despite the IDE error.