[skip ci] Updated build config

Author: Simon Hofmann

.travis.yml

@@ -41,6 +41,7 @@ install: travis_wait 30 docker pull justadudewhohacks/opencv4nodejs-ci:$TAG
 script:
   - cd ./ci/$BUILD_TASK
   - npm run $BUILD_TASK $TAG
+  - cd -
 
 after_success:
   - if [[ $TRAVIS_TAG != "" ]]; then

appveyor.yml

@@ -58,6 +58,7 @@ test_script:
   - npm run test-externalMemTracking
 
 on_success:
-  - IF defined APPVEYOR_REPO_TAG_NAME npm install && npm run prebuild -- -u %GITHUB_TOKEN%
-  - IF defined APPVEYOR_REPO_TAG_NAME npm install && npm run prebuild -- -r electron -u %GITHUB_TOKEN%
-  - IF defined APPVEYOR_REPO_TAG_NAME npm install && npm run prebuild -- -r node-webkit -u %GITHUB_TOKEN%
+  - cmd: cd c:\projects\opencv4nodejs
+  - IF defined APPVEYOR_REPO_TAG_NAME npm run prebuild -- -u %GITHUB_TOKEN%
+  - IF defined APPVEYOR_REPO_TAG_NAME npm run prebuild -- -r electron -u %GITHUB_TOKEN%
+  - IF defined APPVEYOR_REPO_TAG_NAME npm run prebuild -- -r node-webkit -u %GITHUB_TOKEN%