fix(deps): pin dependency quicktype-core to 6.0.69 (#146)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [quicktype-core](https://togithub.com/quicktype/quicktype) | dependencies | pin | [`^6.0.69` -> `6.0.69`](https://renovatebot.com/diffs/npm/quicktype-core//) |

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tools/quicktype-wrapper/package.json

@@ -25,7 +25,7 @@
   },
   "dependencies": {
     "mkdirp": "1.0.4",
-    "quicktype-core": "^6.0.69",
+    "quicktype-core": "6.0.69",
     "recursive-readdir": "2.2.2",
     "yargs": "16.2.0"
   }