Closes #79 Fix dereference of alias schemas

Author: walsha2

lib/src/generators/schema.dart

@@ -160,6 +160,13 @@ class SchemaGenerator extends BaseGenerator {
         enumeration: (schema) {
           _writeEnumeration(name: name, schema: schema);
         },
+        string: (value) {
+          _writeTypedef(
+            name: name,
+            description: value.description,
+            def: 'String',
+          );
+        },
         array: (schema) {
           final iType = schema.items.toDartType();
           _writeTypedef(

test/misc/misc.json

@@ -31,13 +31,30 @@
     }
   },
   "components": {
+    "securitySchemes": {
+      "HTTPBearer": {
+        "type": "http",
+        "scheme": "bearer"
+      }
+    },
     "schemas": {
       "MapResult": {
         "properties": {},
         "additionalProperties": true,
         "type": "object",
         "title": "MapResult",
         "description": "A MapResult"
+      },
+      "StringAlias": {
+        "type": "string"
+      },
+      "MyObject": {
+        "type": "object",
+        "properties": {
+          "myField": {
+            "$ref": "#/components/schemas/StringAlias"
+          }
+        }
       }
     }
   }