Add coveralls.

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

.coveralls.yml

@@ -0,0 +1 @@
+service_name: travis-ci

.gitattributes

@@ -4,6 +4,7 @@
 /docs export-ignore
 /examples export-ignore
 /tests export-ignore
+/.coveralls.yml export-ignore
 /.gitattributes export-ignore
 /.gitignore export-ignore
 /.php_cs export-ignore

.travis.yml

@@ -1,6 +1,5 @@
 language: php
 sudo: false
-dist: trusty
 
 php:
   - 5.6
@@ -21,7 +20,7 @@ before_script:
   - if [[ $setup = 'basic' ]]; then travis_retry composer install --prefer-dist --no-interaction; fi
   - if [[ $setup = 'stable' ]]; then travis_retry composer update --prefer-dist --no-interaction --prefer-stable; fi
   - if [[ $setup = 'lowest' ]]; then travis_retry composer update --prefer-dist --no-interaction --prefer-lowest --prefer-stable; fi
-  - if [[ $setup = 'coveralls' ]]; then travis_retry composer require "satooshi/php-coveralls=~0.7" --prefer-dist --no-interaction --dev; fi
+  - if [[ $setup = 'coveralls' ]]; then travis_retry composer require "satooshi/php-coveralls=~1.0" --prefer-dist --no-interaction --dev; fi
 
 script:
   - if [[ $coverage = 'yes' ]]; then vendor/bin/phpunit -c phpunit.xml --coverage-clover build/logs/clover.xml; fi