Restore linter run in travis

Author: javivelasco

.travis.yml

@@ -5,3 +5,7 @@ language: node_js
 node_js:
   - "node"
   - "lts/*"
+
+script:
+  - npm run lint
+  - npm test

package.json

@@ -104,7 +104,6 @@
     "patch": "bumped release patch",
     "prebuild": "npm run clean",
     "prepublish": "npm run build",
-    "pretest": "npm run lint",
     "release": "bumped release",
     "start": "cross-env NODE_ENV=development UV_THREADPOOL_SIZE=100 node ./server",
     "test": "jest",