fix gitlab-ci conf

.gitlab-ci.yml

@@ -14,5 +14,5 @@ unit_otcore:
   stage: test
 
   script:
-    - php composer.phar --quiet --no-interaction --working-dir ./ot_core install
+    - php composer.phar --quiet --no-interaction --working-dir=./ot_core install
     - ./ot_core/.Build/bin/phpunit -c ./ot_core/Tests/Build/UnitTests.xml