cicd: added stage for publication

.gitlab-ci.yml

@@ -3,6 +3,7 @@ image: node:11
 stages:
  - integration
  - acceptance
+ - release
  - deployment
 
 ## TESTING ##
@@ -94,6 +95,18 @@ stg2:
   tags:
     - deploy
 
+## RELEASE TAGGING ##
+
+publish:
+  stage: release
+  script:
+    - npm install -g semantic-release@v17 @semantic-release/gitlab
+    - semantic-release
+  only:
+    - master
+  tags:
+    - deploy
+
 ## LIVE DEPLOYMENTS ##
 
 alpha: