fix(ewl): pin winston v3.15.0

| datasource | package | from  | to     |
| ---------- | ------- | ----- | ------ |
| npm        | winston | 3.8.2 | 3.15.0 |

Author: renovate[bot]

packages/ewl/package.json

@@ -36,7 +36,7 @@
     "triple-beam": "1.3.0",
     "uuid": "9.0.0",
     "validator": "13.9.0",
-    "winston": "3.8.2",
+    "winston": "3.15.0",
     "winston-transport": "4.5.0"
   },
   "devDependencies": {