ci(deploy): run semantic release within travis

.travis.yml

@@ -1,18 +1,15 @@
 language: node_js
-cache:
-  directories:
-    - node_modules
-notifications:
-  email: false
 node_js:
   - '8'
-before_script:
-  - npm prune
+cache:
+  directories:
+    - "node_modules"
 script:
-  - npm run test
+  - npm run lint
+  - npm test
   - npm run coveralls
-after_success:
-  - npm run semantic-release
-branches:
-  except:
-    - /^v\d+\.\d+\.\d+$/
+deploy:
+  provider: script
+  skip_cleanup: true
+  script:
+    - npx semantic-release