Update Travis CI config for NestJS

Signed-off-by: David Mehren <git@herrmehren.de>

.travis.yml

@@ -2,6 +2,18 @@ language: node_js
 dist: xenial
 cache: yarn
 
+stages:
+  - Static Tests
+  - test
+
+node_js:
+  - 10
+  - 12
+env:
+  - TEST_SUITE=test
+  - TEST_SUITE=test:e2e
+script: "yarn run $TEST_SUITE"
+
 jobs:
   include:
     - stage: Static Tests
@@ -9,27 +21,8 @@ jobs:
       node_js:
         - 10
       script:
-        - yarn run eslint
+        - yarn run lint
     - name: ShellCheck
       script:
         - shellcheck bin/heroku bin/setup
       language: generic
-    - name: json-lint
-      addons:
-        apt:
-          packages:
-          - jq
-      script:
-        - yarn run jsonlint
-      language: generic
-    - stage: Dynamic Tests
-      name: Node.js 10
-      node_js:
-        - 10
-      script:
-        - yarn run mocha-suite
-    - name: Node.js 12
-      node_js:
-        - 12
-      script:
-        - yarn run mocha-suite