[update] build deps (#198)

* [update] build deps
* updated travis node versions
* updated stan version

.travis.yml

@@ -2,15 +2,15 @@ language: node_js
 sudo: false
 
 node_js:
-  - "10"
   - "12"
   - "14"
+  - "16"
 
 git:
   depth: false
 
 env:
-  - STAN_VERSION=v0.21.1
+  - STAN_VERSION=v0.22.0
 
 before_script:
   - wget "https://github.com/nats-io/nats-streaming-server/releases/download/$STAN_VERSION/nats-streaming-server-$STAN_VERSION-linux-amd64.zip" -O tmp.zip
@@ -23,7 +23,7 @@ script:
   - npm test
 
 after_success:
-  - if [[ "$TRAVIS_NODE_VERSION" == 13 ]]; then npm run coveralls; fi
+  - if [[ "$TRAVIS_NODE_VERSION" == 16 ]]; then npm run coveralls; fi
 
 after_failure:
   - cat nats-streaming-server/logs/*.log