allow map[string]interface{}, and other such things, as scalars

generate/testdata/errors/InvalidScalar.go.error

@@ -1 +1 @@
-unknown name "bogus"; expected a builtin or path/to/package.Name
+invalid type-name "bogus" (unknown type-name "bogus"); expected a builtin, path/to/package.Name, interface{}, or a slice, map, or pointer of those

generate/testdata/errors/InvalidScalar.graphql.error

@@ -1 +1 @@
-unknown name "bogus"; expected a builtin or path/to/package.Name
+invalid type-name "bogus" (unknown type-name "bogus"); expected a builtin, path/to/package.Name, interface{}, or a slice, map, or pointer of those

generate/testdata/queries/EmptyInterface.graphql

@@ -1 +1 @@
-query EmptyInterface { getJunk }
+query EmptyInterface { getJunk getComplexJunk }

generate/testdata/queries/EmptyInterface.graphql.go

@@ -7,7 +7,8 @@ import (
 )
 
 type EmptyInterfaceResponse struct {
-	GetJunk interface{} `json:"getJunk"`
+	GetJunk        interface{}                             `json:"getJunk"`
+	GetComplexJunk []map[string]*[]*map[string]interface{} `json:"getComplexJunk"`
 }
 
 func EmptyInterface(
@@ -20,6 +21,7 @@ func EmptyInterface(
 		`
 query EmptyInterface {
 	getJunk
+	getComplexJunk
 }
 `,
 		&retval,

generate/testdata/queries/EmptyInterface.graphql.json

@@ -2,7 +2,7 @@
   "operations": [
     {
       "operationName": "EmptyInterface",
-      "query": "\nquery EmptyInterface {\n\tgetJunk\n}\n",
+      "query": "\nquery EmptyInterface {\n\tgetJunk\n\tgetComplexJunk\n}\n",
       "sourceLocation": "testdata/queries/EmptyInterface.graphql"
     }
   ]

generate/testdata/queries/schema.graphql

@@ -1,6 +1,6 @@
 scalar DateTime
-
 scalar Junk
+scalar ComplexJunk
 
 enum Role {
   STUDENT
@@ -67,6 +67,7 @@ type Query {
   convert(dt: DateTime!, tz: String): DateTime!
   maybeConvert(dt: DateTime, tz: String): DateTime
   getJunk: Junk
+  getComplexJunk: ComplexJunk
   listOfListsOfLists: [[[String!]!]!]!
 }