fix(graphql): type helpers metadata inheriting

Yarn PnP doesn't implicitly inherit transitive peer dependencies class-validator and class-transformer from @nestjs/mapped-types.

nestjs/swagger#2169

Author: khmm12

packages/graphql/package.json

@@ -46,6 +46,8 @@
     "@apollo/subgraph": "^0.1.5 || ^0.3.0 || ^0.4.0 || ^2.0.0",
     "@nestjs/common": "^8.2.3 || ^9.0.0",
     "@nestjs/core": "^8.2.3 || ^9.0.0",
+    "class-transformer": "*",
+    "class-validator": "*",
     "graphql": "^15.8.0 || ^16.0.0",
     "reflect-metadata": "^0.1.13",
     "ts-morph": "^13.0.2 || ^14.0.0 || ^15.0.0 || ^16.0.0"
@@ -54,6 +56,12 @@
     "@apollo/subgraph": {
       "optional": true
     },
+    "class-transformer": {
+      "optional": true
+    },
+    "class-validator": {
+      "optional": true
+    },
     "ts-morph": {
       "optional": true
     }