fix: Add Node 10 to Travis (#23)

This should fix semantic release since it requires Node 10 now.

Author: bebraw

.travis.yml

@@ -5,6 +5,7 @@ cache:
 node_js:
   - 8
   - 9
+  - 10
 after_success:
   - npm install --no-save semantic-release-tamia
   - npx semantic-release --analyze-commits semantic-release-tamia/analyzeCommits --verify-release semantic-release-tamia/verifyRelease --generate-notes semantic-release-tamia/generateNotes