Upgrade autorest version

Author: Descatles

generator/package.json

@@ -12,9 +12,9 @@
     "postprocessor": "ts-node cmd/postprocessor"
   },
   "devDependencies": {
-    "autorest": "^3.0.6187",
+    "autorest": "^3.0.6244",
     "@autorest/azureresourceschema": "^3.0.79",
-    "@autorest/core": "^3.0.6257",
+    "@autorest/core": "^3.0.6318",
     "@types/async": "^3.2.0",
     "@types/lodash": "^4.14.149",
     "@types/node": "^13.11.0",

swagger_to_sdk_config.json

@@ -3,7 +3,7 @@
   "meta": {
     "autorest_options": {
       "use": "@autorest/azureresourceschema@3.0.79",
-      "version": "3.0.6274",
+      "version": "3.0.6318",
       "azureresourceschema": "",
       "multiapi": "",
       "sdkrel:azureresourceschema-folder": ".",