Better preversion script

Author: nfour

package.json

@@ -24,7 +24,7 @@
     "test:build": "jest -c '{}' build",
     "test:coverage": "jest --coverage",
     "lint": "tslint -p tsconfig.json --type-check -c tslint.json",
-    "preversion": "npm run lint && npm run test",
+    "preversion": "yarn lint && yarn build && yarn test:build",
     "release": "cd build && npm publish",
     "test:project": "cd test/project && yarn sls openapi generate",
     "test:prepare": "scripts/prepareTests.bash",