fix: conditional for test script

package.json

@@ -7,7 +7,7 @@
     "service": "node ./bin",
     "help": "node ./bin --help",
     "release": "standard-version",
-    "test": "if [ ! -d \"example\" ]; then npm run build; fi && npm run test-express && npm run test-fastify",
+    "test": "if [ ! -d \"example/fastify/node_modules\" ]; then npm run build; fi && npm run test-express && npm run test-fastify",
     "build": "npm run rm && npm run build-express && npm run build-fastify && npm run build-express-graphql && npm run build-fastify-graphql",
     "build-express": "npm run rm-express && npm run cd-mv-example && node -r dotenv/config ./bin -N example/express -D 'This is a test using express' -a AnthonyLzq -e sluzquinosa@uni.pe -l mit -H --tests --ghat && npm run rm-git-express",
     "build-fastify": "npm run rm-fastify && npm run cd-mv-example && node -r dotenv/config ./bin -N example/fastify -D 'This is a test using fastify' -a AnthonyLzq -e sluzquinosa@uni.pe -l mit -H -F --tests --ghat && npm run rm-git-fastify",