Publish `v1.3.1` toolkit package (#520)

Description of changes

Publish the v1.3.1 of the toolkit package to NPM. See releases for more details.

package-lock.json

@@ -1,12 +1,12 @@
 {
 	"name": "@vscode/webview-ui-toolkit",
-	"version": "1.3.0",
+	"version": "1.3.1",
 	"lockfileVersion": 2,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "@vscode/webview-ui-toolkit",
-			"version": "1.3.0",
+			"version": "1.3.1",
 			"license": "MIT",
 			"dependencies": {
 				"@microsoft/fast-element": "^1.6.2",

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@vscode/webview-ui-toolkit",
-	"version": "1.3.0",
+	"version": "1.3.1",
 	"description": "A component library for building webview-based extensions in Visual Studio Code.",
 	"homepage": "https://github.com/microsoft/vscode-webview-ui-toolkit#readme",
 	"license": "MIT",