Update travis build

.travis.yml

@@ -24,24 +24,22 @@ before_install:
   - docker run -d -v ${PWD}/test-autobahn/config:/config -v ${PWD}/test-autobahn/reports:/reports -p 9001:9001 --name fuzzingserver crossbario/autobahn-testsuite
 
 install:
-  - composer update -n --prefer-dist
+  - travis_retry composer update -n --prefer-dist
 
   - mkdir -p coverage/cov coverage/bin
   - wget https://phar.phpunit.de/phpcov.phar -O coverage/bin/phpcov
   - chmod +x coverage/bin/phpcov
 
-  - composer show
-
 script:
   - vendor/bin/phpunit --verbose --coverage-php coverage/cov/main.cov
   - php test-autobahn/runner.php
   - PHP_CS_FIXER_IGNORE_ENV=1 php vendor/bin/php-cs-fixer --diff --dry-run -v fix
 
 after_script:
-  - curl -OL https://github.com/php-coveralls/php-coveralls/releases/download/v1.0.0/coveralls.phar
-  - chmod +x coveralls.phar
+  - wget https://github.com/php-coveralls/php-coveralls/releases/download/v2.2.0/php-coveralls.phar
+  - chmod +x php-coveralls.phar
   - coverage/bin/phpcov merge --clover build/logs/clover.xml coverage/cov
-  - ./coveralls.phar
+  - travis_retry ./php-coveralls.phar -v
 
 cache:
   directories: