fix: restore openapi-types@12.1.3 to package-lock.json

PR #29 accidentally dropped the openapi-types peer dependency entry
from the lock file. This restores it by re-running npm install, which
resolves the CI failure: "Missing: openapi-types@12.1.3 from lock file".

Co-Authored-By: Paperclip <noreply@paperclip.ing>

package-lock.json

@@ -13289,6 +13289,14 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/openapi-types": {
+      "version": "12.1.3",
+      "resolved": "https://registry.npmjs.org/openapi-types/-/openapi-types-12.1.3.tgz",
+      "integrity": "sha512-N4YtSYJqghVu4iek2ZUvcN/0aqH1kRDuNqzcycDxhOUpg7GdvLa2F3DgS6yBNhInhv2r/6I0Flkn7CqL8+nIcw==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true
+    },
     "node_modules/optionator": {
       "version": "0.9.4",
       "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.9.4.tgz",