fix(Travis): fix semantic release

Author: st0ffern

.travis.yml

@@ -1,16 +1,18 @@
 language: node_js
 cache:
   directories:
-    - node_modules
+    - ~/.npm
 notifications:
   email: false
 node_js:
   - '9'
   - '8'
+install:
+  - npm install
 before_script:
   - npm prune
 after_success:
   - npm run semantic-release
 branches:
   except:
-    - /^v\d+\.\d+\.\d+$/
+    - /^v\d+\.\d+\.\d+$/