chore(release): publish

- netlify-cms-app@2.14.15
 - netlify-cms-core@2.36.14
 - netlify-cms-lib-util@2.12.2
 - netlify-cms-proxy-server@1.3.9
 - netlify-cms-widget-file@2.9.0
 - netlify-cms-widget-markdown@2.12.9
 - netlify-cms@2.10.85

packages/netlify-cms-proxy-server/package.json

@@ -1,7 +1,7 @@
 {
   "name": "netlify-cms-proxy-server",
   "description": "Proxy server to be used with Netlify CMS proxy backend",
-  "version": "1.3.8",
+  "version": "1.3.9",
   "repository": "https://github.com/netlify/netlify-cms/tree/master/packages/netlify-cms-proxy-server",
   "bugs": "https://github.com/netlify/netlify-cms/issues",
   "license": "MIT",
@@ -41,7 +41,7 @@
     "@types/node": "^13.13.16",
     "@types/vfile-message": "^2.0.0",
     "jest": "^26.1.0",
-    "netlify-cms-lib-util": "^2.12.1",
+    "netlify-cms-lib-util": "^2.12.2",
     "nodemon": "^2.0.2",
     "ts-jest": "^26.0.0",
     "ts-loader": "^8.0.0",