fix(build): setup semantic release again

.travis.yml

@@ -1,20 +1,20 @@
 language: node_js
-cache:
-  directories:
-    - node_modules
+node_js:
+  - 10
+  - 8
 notifications:
   email: false
-node_js:
-  - '7'
-  - '6'
-  - '4'
 before_script:
   - npm prune
 script:
   - npm run lint
   - npm test
-after_success:
-  - npm run semantic-release
-branches:
-  except:
-    - /^v\d+\.\d+\.\d+$/
+jobs:
+  include:
+    - stage: release
+      node_js: lts/*
+      deploy:
+        provider: script
+        skip_cleanup: true
+        script:
+          - npx semantic-release

package.json

@@ -123,7 +123,7 @@
     "prepublish": "npm run tidy && npm run build",
     "test": "jest",
     "tidy": "rimraf modules cjs dist",
-    "semantic-release": "semantic-release pre && npm publish && semantic-release post"
+    "semantic-release": "semantic-release"
   },
   "version": "0.0.0-development"
 }