Bump winston from 3.13.1 to 3.15.0

Bumps [winston](https://github.com/winstonjs/winston) from 3.13.1 to 3.15.0.
- [Release notes](https://github.com/winstonjs/winston/releases)
- [Changelog](https://github.com/winstonjs/winston/blob/master/CHANGELOG.md)
- [Commits](winstonjs/winston@v3.13.1...v3.15.0)

---
updated-dependencies:
- dependency-name: winston
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -5767,7 +5767,7 @@
   },
   "dependencies": {
     "paredit.js": "./vendor/paredit.js",
-    "winston": "^3.13.1",
+    "winston": "^3.15.0",
     "winston-console-for-electron": "^0.0.7"
   }
 }

yarn.lock

@@ -4746,10 +4746,10 @@ winston-transport@^4.3.0, winston-transport@^4.7.0:
     readable-stream "^3.6.0"
     triple-beam "^1.3.0"
 
-winston@^3.13.1:
-  version "3.13.1"
-  resolved "https://registry.yarnpkg.com/winston/-/winston-3.13.1.tgz#53ddadb9c2332eb12cff8306413b3480dc82b6c3"
-  integrity sha512-SvZit7VFNvXRzbqGHsv5KSmgbEYR5EiQfDAL9gxYkRqa934Hnk++zze0wANKtMHcy/gI4W/3xmSDwlhf865WGw==
+winston@^3.15.0:
+  version "3.15.0"
+  resolved "https://registry.yarnpkg.com/winston/-/winston-3.15.0.tgz#4df7b70be091bc1a38a4f45b969fa79589b73ff5"
+  integrity sha512-RhruH2Cj0bV0WgNL+lOfoUBI4DVfdUNjVnJGVovWZmrcKtrFTTRzgXYK2O9cymSGjrERCtaAeHwMNnUWXlwZow==
   dependencies:
     "@colors/colors" "^1.6.0"
     "@dabh/diagnostics" "^2.0.2"