use latest oav beta version. (#23)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@azure/rest-api-specs-scripts",
-  "version": "0.5.4",
+  "version": "0.5.5",
   "description": "Scripts for the Azure RestAPI specification repository 'azure-rest-api-specs'.",
   "types": "dist/index.d.ts",
   "main": "dist/index.js",
@@ -40,7 +40,7 @@
     "fs-extra": "^7.0.1",
     "glob": "^7.1.3",
     "js-yaml": "^3.13.1",
-    "oav": "0.19.7-beta.2",
+    "oav": "0.19.7-beta.3",
     "request": "^2.88.0"
   }
 }