Generate coverage statistics.

Author: bonzai

.gitattributes

@@ -6,5 +6,6 @@
 /.gitignore export-ignore
 /.travis.yml export-ignore
 /CHANGELOG.md export-ignore
+/coverage.xml export-ignore
 /phpunit.xml.dist export-ignore
 /README.md export-ignore

.gitignore

@@ -1,3 +1,4 @@
 vendor/
 composer.lock
+coverage.xml
 phpunit.xml

.travis.yml

@@ -13,4 +13,7 @@ install:
   - travis_retry composer install --no-interaction --prefer-dist
 
 script:
-  - vendor/bin/phpunit
+  - vendor/bin/phpunit --coverage-clover=coverage.xml
+
+after_success:
+    - bash <(curl -s https://codecov.io/bash)