fix(): pin typeorm ^0.3.20

| datasource | package | from  | to     |
| ---------- | ------- | ----- | ------ |
| npm        | typeorm | 0.3.7 | 0.3.20 |

Author: renovate[bot]

package.json

@@ -85,7 +85,7 @@
     "reflect-metadata": "^0.1.13",
     "rxjs": "^7.5.6",
     "swagger-ui-express": "^4.5.0",
-    "typeorm": "^0.3.7",
+    "typeorm": "^0.3.20",
     "uuid": "^8.3.2",
     "validator": "^13.7.0",
     "winston": "^3.8.1"