Update CI script

Author: kevinresol

.travis.yml

@@ -1,23 +1,45 @@
 sudo: required
 dist: trusty
 
-language: haxe
+stages:
+  - test
+  - deploy
+
+language: node_js
+node_js: 8
+
+cache:
+  directories:
+    - $HOME/haxe
 
 os:
   - linux
-  - osx
-  
-haxe:
-  - "3.4.0"
-  - development
+  # - osx
+
+env:
+  - HAXE_VERSION=3.4.7
+  - HAXE_VERSION=latest
+  # - HAXE_VERSION=nightly
 
-matrix:
-  allow_failures:
-    - haxe: development
-    
 install:
-  - haxelib install travix
-  - haxelib run travix install
-
+  - npm i -g lix
+  - lix install haxe $HAXE_VERSION
+  - lix download
+  
 script:
-  - haxelib run travix js
+  - lix run travix js
+
+jobs:
+  include:
+    # - stage: test # should uncomment this when there is no matrix above (e.g. only one os, one env, etc)
+    # - stage: deploy
+    #   os: linux
+    #   install:
+    #     - npm i -g lix
+    #     - lix download
+    #   script: skip
+    #   env:
+    #     secure: xxx
+    #   after_success:
+    #     - lix run travix install
+    #     - lix run travix release