Fix coveralls not working reliably in builds

Author: VasekPurchart

.travis.yml

@@ -19,6 +19,9 @@ before_script:
 script:
   - bin/phing
 after_script:
-  - php bin/coveralls -v --config build/coveralls.yml
+  - if [ "${TRAVIS_ALLOW_FAILURE}" = false ]; then
+        wget https://github.com/satooshi/php-coveralls/releases/download/v1.0.0/coveralls.phar
+        && php coveralls.phar --verbose --config build/coveralls.yml;
+    fi
 notifications:
   email: false

composer.json

@@ -16,8 +16,7 @@
 		"jakub-onderka/php-parallel-lint": "^0.9.2",
 		"phing/phing": "^2.16",
 		"phpstan/phpstan": "^0.6.3",
-		"phpunit/phpunit": "^6.0.1",
-		"satooshi/php-coveralls": "^1.0"
+		"phpunit/phpunit": "^6.0.1"
 	},
 	"autoload": {
 		"psr-4": {