[release] package.json: update version to v0.31.1

For golang/vscode-go#2060

Change-Id: Ie9db402fc8fb950b6d8b14e12adc525d107f888a
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/384174
Trust: Hyang-Ah Hana Kim <hyangah@gmail.com>
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Suzy Mueller <suzmue@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>

package-lock.json

diff --git a/package-lock.json b/package-lock.json
index baeb441..7aaccc3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "go",
-  "version": "0.31.0",
+  "version": "0.31.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "go",
-      "version": "0.31.0",
+      "version": "0.31.1",
       "license": "MIT",
       "dependencies": {
         "deep-equal": "2.0.5",

package.json

diff --git a/package.json b/package.json
index 77dfc5b..663caa1 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "go",
   "displayName": "Go",
-  "version": "0.31.0",
+  "version": "0.31.1",
   "publisher": "golang",
   "description": "Rich Go language support for Visual Studio Code",
   "author": {