Merge pull request #230 from baopham/hotfix/travis-fix

Fix issues with travis ci

Author: JackPriceBurns

.travis.yml

@@ -15,7 +15,7 @@ before_script:
   - java -Djava.library.path=./DynamoDBLocal_lib -jar dynamodb_local/DynamoDBLocal.jar --port 3000 &
   - sleep 2
   - composer self-update
-  - composer install
+  - COMPOSER_MEMORY_LIMIT=-1 travis_retry composer install --prefer-dist --no-interaction
 
 script: ./vendor/bin/phpunit