Added coveralls to travis config

.travis.yml

@@ -5,11 +5,16 @@ php:
     - 5.5
     - 5.6
     - 7.0
-    - nightly
+    - 7.1
     - hhvm
 
 install:
-    - composer install --prefer-dist
+    - composer install --dev --prefer-dist
 
 script:
-    - ./bin/phpunit tests/
+    - mkdir -p build/logs
+    - bin/phpunit -c phpunit.xml.dist --coverage-clover build/logs/clover.xml
+
+after_success:
+    - composer require "satooshi/php-coveralls:^1.0"
+    - travis_retry php bin/coveralls -v

phpunit.xml.dist

@@ -19,10 +19,15 @@
 
     <filter>
         <whitelist>
-            <directory>./</directory>
+            <directory suffix=".php">./src</directory>
             <exclude>
+                <directory>./bin</directory>
+                <directory>./docs</directory>
+                <directory>./build</directory>
                 <directory>./tests</directory>
                 <directory>./vendor</directory>
+                <directory>./examples</directory>
+                <directory>./benchmarks</directory>
             </exclude>
         </whitelist>
     </filter>