fix: package.json & yarn.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-JSYAML-13961110

Author: snyk-bot

package.json

@@ -39,7 +39,7 @@
     "retry": "^0.12.0",
     "squel": "^5.12.2",
     "stellar-base": "^3.0.4",
-    "typeorm": "^0.2.17",
+    "typeorm": "^0.2.32",
     "typescript-memoize": "^1.0.0-alpha.3",
     "winston": "^3.0.0"
   },