Remove Go 1.17 support

Go 1.18 had some breaking changes on source level meaning we cannot build on older Go versions anymore.

The improvements in Go 1.18 (e.g. `break` and `continue`)  were to good to pass on.

Note that you don't need Go (or Go 1.18) to run a pre-built binary.

Updates #9677

go.mod

@@ -1,10 +1,8 @@
 module github.com/gohugoio/hugo
 
 require (
-	cloud.google.com/go/iam v0.2.0 // indirect
 	github.com/BurntSushi/locker v0.0.0-20171006230638-a6e239ea1c69
 	github.com/PuerkitoBio/purell v1.1.1
-	github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 // indirect
 	github.com/alecthomas/chroma v0.10.0
 	github.com/armon/go-radix v1.0.0
 	github.com/aws/aws-sdk-go v1.43.5
@@ -42,7 +40,6 @@ require (
 	github.com/mitchellh/hashstructure v1.1.0
 	github.com/mitchellh/mapstructure v1.4.3
 	github.com/muesli/smartcrop v0.3.0
-	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect
 	github.com/niklasfasching/go-org v1.6.2
 	github.com/olekukonko/tablewriter v0.0.5
 	github.com/pelletier/go-toml/v2 v2.0.0-beta.6
@@ -70,4 +67,42 @@ require (
 	gopkg.in/yaml.v2 v2.4.0
 )
 
-go 1.16
+require (
+	cloud.google.com/go v0.100.2 // indirect
+	cloud.google.com/go/compute v1.3.0 // indirect
+	cloud.google.com/go/iam v0.2.0 // indirect
+	cloud.google.com/go/storage v1.14.0 // indirect
+	github.com/Azure/azure-pipeline-go v0.2.2 // indirect
+	github.com/Azure/azure-storage-blob-go v0.9.0 // indirect
+	github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.1 // indirect
+	github.com/dlclark/regexp2 v1.4.0 // indirect
+	github.com/go-openapi/jsonpointer v0.19.5 // indirect
+	github.com/go-openapi/swag v0.19.5 // indirect
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/uuid v1.1.2 // indirect
+	github.com/google/wire v0.4.0 // indirect
+	github.com/googleapis/gax-go v2.0.2+incompatible // indirect
+	github.com/googleapis/gax-go/v2 v2.1.1 // indirect
+	github.com/inconshreveable/mousetrap v1.0.0 // indirect
+	github.com/jmespath/go-jmespath v0.4.0 // indirect
+	github.com/kr/pretty v0.3.0 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/mailru/easyjson v0.0.0-20190626092158-b2ccc519800e // indirect
+	github.com/mattn/go-ieproxy v0.0.1 // indirect
+	github.com/mattn/go-runewidth v0.0.9 // indirect
+	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/tdewolff/parse/v2 v2.5.27 // indirect
+	go.opencensus.io v0.23.0 // indirect
+	golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8 // indirect
+	golang.org/x/sys v0.0.0-20220209214540-3681064d5158 // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/genproto v0.0.0-20220218161850-94dd64e39d7c // indirect
+	google.golang.org/grpc v1.44.0 // indirect
+	google.golang.org/protobuf v1.27.1 // indirect
+)
+
+go 1.18