Updated Travis config to make use of new build task

Author: Simon Hofmann

.travis.yml

@@ -32,21 +32,26 @@ env:
     TAG=3.4.3
   - BUILD_TASK=test
     TAG=3.4.3-contrib
+  - BUILD_TASK=prebuild
+    TAG=3.4.3-contrib
 
 before_install:
   - chmod +x ./ci/$BUILD_TASK/$BUILD_TASK.sh
 
 install: travis_wait 30 docker pull justadudewhohacks/opencv4nodejs-ci:$TAG
 
 script:
-  - cd ./ci/$BUILD_TASK
-  - npm run $BUILD_TASK $TAG
-  - cd -
+  - if [[ $BUILD_TASK != "prebuild" ]]; then
+    cd ./ci/$BUILD_TASK
+    npm run $BUILD_TASK $TAG
+    cd -
+    fi
 
 after_success:
-  - if [[ $TRAVIS_TAG != "" ]]; then
-    npm install;
-    npm run prebuild -- -u $GITHUB_TOKEN;
+  - if [[ $TRAVIS_TAG != "" && $BUILD_TASK == "prebuild" ]]; then
+    cd ./ci/$BUILD_TASK
+    npm run $BUILD_TASK $TAG
+    cd -
     fi
   - if [ $BUILD_TASK = 'cover' ]; then
     npm install;