chore(ci): use Travis jobs & stages

.travis.yml

@@ -1,11 +1,11 @@
-sudo: false
 dist: trusty
 
 language: node_js
 node_js: 8
 
-notifications:
-  email: false
+branches:
+  except:
+    - /^v\d+\.\d+\.\d+$/
 
 cache:
   yarn: true
@@ -23,9 +23,13 @@ install:
 script:
   - true
 
-after_success:
-  - yarn travis-deploy-once "yarn semantic-release"
+jobs:
+  include:
+    - stage: Release
+      if: branch = master AND type = push
+      node_js: node
+      script: yarn semantic-release
+
+notifications:
+  email: false
 
-branches:
-  except:
-    - /^v\d+\.\d+\.\d+$/