fix(travis): fixed node env usage in ci/release process

Author: KaiSchwarz-cnic

.travis.yml

@@ -15,7 +15,15 @@ branches:
   only:
     - master
     - /^dependabot.*$/
+before_install:
+  - export PATH="$HOME/.config/composer/vendor/bin:$PATH"
+  - export TRAVIS_NODE_VERSION="lts/*"
 install:
+  - rm -rf ~/.nvm
+  - git clone https://github.com/creationix/nvm.git ~/.nvm
+  - (cd ~/.nvm && git checkout `git describe --abbrev=0 --tags`)
+  - source ~/.nvm/nvm.sh
+  - nvm install $TRAVIS_NODE_VERSION
   - travis_retry pip install --upgrade pip
   - pip -V
   - travis_retry pip install --upgrade -r requirements.txt