Fix parse error when generating node from yaml file

Author: kazuhitoyokoi

lib/swagger/index.js

@@ -24,7 +24,7 @@ async function getSpec(src, data) {
             let response = await axios.get(src, requestOptions);
             spec = response.data;
         } else if (/\.yaml$/.test(src)) {
-            spec = yamljs.load(util.skipBom(await fs.promises.readFile(src)));
+            spec = yamljs.load(src);
         } else if (/\.json/.test(src)) {
             spec = JSON.parse(util.skipBom(await fs.promises.readFile(src)));
         } else {