bumped go version and build

Signed-off-by: quobix <dave@quobix.com>

.github/workflows/build.yaml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up Go 1.x
         uses: actions/setup-go@v3
         with:
-          go-version: 1.19
+          go-version: 1.21
         id: go
 
       - name: Checkout code

go.mod

@@ -1,8 +1,9 @@
 module github.com/pb33f/libopenapi
 
-go 1.20
+go 1.21
 
 require (
+	github.com/lucasjones/reggen v0.0.0-20200904144131-37ba4fa293bb
 	github.com/stretchr/testify v1.8.0
 	github.com/vmware-labs/yaml-jsonpath v0.3.2
 	golang.org/x/exp v0.0.0-20230811145659-89c5cff77bcb
@@ -13,6 +14,5 @@ require (
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dprotaso/go-yit v0.0.0-20220510233725-9ba8df137936 // indirect
-	github.com/lucasjones/reggen v0.0.0-20200904144131-37ba4fa293bb // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 )

go.sum

@@ -97,6 +97,7 @@ golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.1.0 h1:kunALQeHf1/185U1i0GOB/fy1IPRDDpuoOOqRReG57U=
+golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=