fix(travis): review travis/semantic-release config

Author: KaiSchwarz-cnic

.gitignore

@@ -33,4 +33,5 @@ settings.xml
 
 .vscode
 .settings
-.sts4-cache
+.sts4-cache
+node_modules

.travis.yml

@@ -23,7 +23,11 @@ after_success:
   - if [[ "$TRAVIS_BRANCH" == "master" && "$TRAVIS_PULL_REQUEST" == "false" ]]; then
       git config --replace-all remote.origin.fetch +refs/heads/*:refs/remotes/origin/* &&
       git fetch --tags &&
-      semantic-release --prepare @conveyal/maven-semantic-release --publish @semantic-release/github,@conveyal/maven-semantic-release --verify-conditions @semantic-release/github --verify-release @conveyal/maven-semantic-release ; fi
+      nvm install lts/* &&
+      nvm use lts/* &&
+      npm prune &&
+      npm i &&
+      npx travis-deploy-once "npx semantic-release" ; fi
 branches:
   except:
   - "/^v\\d+\\.\\d+\\.\\d+$/"