Isolate jennifer dependency to spdxgen package (#23)

spdx/types.go

@@ -4,10 +4,6 @@
 
 package spdx
 
-import (
-	"github.com/dave/jennifer/jen"
-)
-
 type License struct {
 	Name             string   `json:"name"`
 	Identifier       string   `json:"licenseId"`
@@ -18,16 +14,3 @@ type License struct {
 	Deprecated       bool     `json:"isDeprecatedLicenseId"`
 	OSIApproved      bool     `json:"isOsiApproved"`
 }
-
-func (l *License) JenValue() jen.Dict {
-	return jen.Dict{
-		jen.Id("Name"):             jen.Lit(l.Name),
-		jen.Id("Identifier"):       jen.Lit(l.Identifier),
-		jen.Id("Text"):             jen.Lit(l.Text),
-		jen.Id("URIs"):             jen.Lit(l.URIs),
-		jen.Id("StandardTemplate"): jen.Lit(l.StandardTemplate),
-		jen.Id("StandardHeader"):   jen.Lit(l.StandardHeader),
-		jen.Id("Deprecated"):       jen.Lit(l.Deprecated),
-		jen.Id("OSIApproved"):      jen.Lit(l.OSIApproved),
-	}
-}

spdxgen/main.go

@@ -102,7 +102,16 @@ func render(pkg string, license spdx.License) string {
 	// https://github.com/golang/go/issues/13560#issuecomment-277804473
 	f.HeaderComment("Code generated by github.com/joshdk/licensor/spdxgen. DO NOT EDIT.")
 
-	value := license.JenValue()
+	value := jen.Dict{
+		jen.Id("Name"):             jen.Lit(license.Name),
+		jen.Id("Identifier"):       jen.Lit(license.Identifier),
+		jen.Id("Text"):             jen.Lit(license.Text),
+		jen.Id("URIs"):             jen.Lit(license.URIs),
+		jen.Id("StandardTemplate"): jen.Lit(license.StandardTemplate),
+		jen.Id("StandardHeader"):   jen.Lit(license.StandardHeader),
+		jen.Id("Deprecated"):       jen.Lit(license.Deprecated),
+		jen.Id("OSIApproved"):      jen.Lit(license.OSIApproved),
+	}
 
 	f.Func().Id("init").Params().Block(
 		jen.Id("licenses").Op("=").Append(