chore: restore keywords and peerDependencies

Author: Himenon

package.json

@@ -7,7 +7,8 @@
     "openapi3",
     "openapi-codegen",
     "openapi-generator",
-    "typescript"
+    "typescript",
+    "typescript-ast"
   ],
   "homepage": "https://github.com/Himenon/openapi-typescript-code-generator#readme",
   "bugs": {
@@ -118,6 +119,9 @@
     "typescript": "6.0.3",
     "vitest": "^4.1.5"
   },
+  "peerDependencies": {
+    "typescript": ">=5"
+  },
   "packageManager": "pnpm@10.33.2",
   "engines": {
     "node": ">=22.0.0"