cannot get/install on go 1.17

[gczobel]

Using go version go1.17.11 linux/amd64

# go install go101.org/golds@latest
go: downloading go101.org/golds v0.5.1
go: downloading golang.org/x/net v0.0.0-20220225172249-27dd8689420f
go: downloading golang.org/x/tools v0.1.10
go: downloading golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e
go: downloading golang.org/x/mod v0.6.0-dev.0.20220106191415-9b9b3d81d5e3
# go101.org/golds/internal/server
/root/go/pkg/mod/go101.org/golds@v0.5.1/internal/server/page_package-details.go:2408:29: undefined: types.TypeParam
note: module requires Go 1.18

# go get -u go101.org/golds
go get: installing executables with 'go get' in module mode is deprecated.
        To adjust and download dependencies of the current module, use 'go get -d'.
        To install using requirements of the current module, use 'go install'.
        To install ignoring the current module, use 'go install' with a version,
        like 'go install example.com/cmd@latest'.
        For more information, see https://golang.org/doc/go-get-install-deprecation
        or run 'go help get' or 'go help install'.
# go101.org/golds/internal/server
/root/go/pkg/mod/go101.org/golds@v0.5.1/internal/server/page_package-details.go:2408:29: undefined: types.TypeParam
note: module requires Go 1.18

[zigo101]

@gczobel

This bug was introduced in fixing #30

Sorry for my carelessness again and many thanks for this finding.

It is just fixed in v0.5.2.