ci(semantic-release): Add @commitlint/cli and @commitlint/config-conventional

Author: Nik Mohamad Aizuddin b. Nik Azmi

.travis.yml

@@ -27,7 +27,7 @@ jobs:
         - wget https://raw.githubusercontent.com/creationix/nvm/v0.33.0/install.sh
         - sudo bash install.sh
         - nvm install lts/*
-        - npm i -D semantic-release @semantic-release/commit-analyzer @semantic-release/release-notes-generator @semantic-release/changelog @semantic-release/npm @semantic-release/github @semantic-release/git @semantic-release/exec
+        - npm i -D semantic-release @semantic-release/commit-analyzer @semantic-release/release-notes-generator @semantic-release/changelog @semantic-release/npm @semantic-release/github @semantic-release/git @semantic-release/exec @commitlint/cli @commitlint/config-conventional
       deploy:
         provider: script
         skip_cleanup: true