Update version to 1.13.1-alpha (#2971)

package-lock.json

@@ -1,12 +1,11 @@
 {
     "name": "vscode-docker",
-    "version": "1.13.0",
+    "version": "1.13.1-alpha",
     "lockfileVersion": 2,
     "requires": true,
     "packages": {
         "": {
-            "name": "vscode-docker",
-            "version": "1.13.0",
+            "version": "1.13.1-alpha",
             "license": "SEE LICENSE IN LICENSE.md",
             "dependencies": {
                 "@azure/arm-appservice": "^6.1.0",

package.json

@@ -1,6 +1,6 @@
 {
     "name": "vscode-docker",
-    "version": "1.13.0",
+    "version": "1.13.1-alpha",
     "publisher": "ms-azuretools",
     "displayName": "Docker",
     "description": "Makes it easy to create, manage, and debug containerized applications.",