Update Traxis configuration.

Now that we use Typescript, we need to build before we
can use the tcp-ws proxy script.

.travis.yml

@@ -1,12 +1,12 @@
 language: node_js
 node_js:
-  - "node"
-  - "10"
-  - "lts/*"
-  
+  - 'node'
+  - '10'
+  - 'lts/*'
+
 matrix:
   allow_failures:
-  - node_js: "node"
+    - node_js: 'node'
 
 services:
   - docker
@@ -17,11 +17,10 @@ env:
 
 before_install:
   - docker run -d --rm -p 8554:8554 steabert/gst-rtsp-launch
-before_script:
-  - node rtsp-ws-server/tcp-ws-proxy.js >& tcp-ws-proxy.log &
 script:
   - yarn test
   - yarn build
+  - node rtsp-ws-server/tcp-ws-proxy.js >& tcp-ws-proxy.log &
   - yarn http-server examples/browser >& http-server.log &
   - yarn cypress run
 deploy:
@@ -33,7 +32,7 @@ deploy:
     on:
       tags: true
       repo: AxisCommunications/media-stream-library-js
-      node: "10"
+      node: '10'
   - provider: npm
     email: stevenv@axis.com
     tag: $NPM_TAG
@@ -43,4 +42,4 @@ deploy:
     on:
       tags: true
       repo: AxisCommunications/media-stream-library-js
-      node: "10"
+      node: '10'