Remove npm refs from package json file

package.json

@@ -11,9 +11,9 @@
   },
   "private": true,
   "scripts": {
-    "start": "npm run generate-json-schema && npx @redocly/openapi-cli preview-docs spec/openapi.yaml -p 8097",
-    "test": "npm run generate-json-schema && npx @redocly/openapi-cli lint spec/openapi.yaml",
-    "generate-json-schema": "npm run clean && node src/main/js/openapi2schema.js -s spec/openapi.yaml -t src/test/resources",
+    "start": "yarn run generate-json-schema && npx @redocly/openapi-cli preview-docs spec/openapi.yaml -p 8097",
+    "test": "yarn run generate-json-schema && npx @redocly/openapi-cli lint spec/openapi.yaml",
+    "generate-json-schema": "yarn run clean && node src/main/js/openapi2schema.js -s spec/openapi.yaml -t src/test/resources",
     "clean": "rm -rf src/test/resources/schemas/"
   }
 }