Add missing package lock file

Automatically generated by running npm install.

Google-bug-id: b/282248596
Change-Id: I6d2c15cf2ba390917919b1f8352913c09b573c9b

package-lock.json

diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..b38d5c9
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,12 @@
+{
+  "name": "reviewers",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "reviewers",
+      "license": "Apache-2.0",
+      "devDependencies": {}
+    }
+  }
+}