Add code coverage

Author: SMillerDev

.travis.yml

@@ -6,11 +6,16 @@ php:
 - '7.2'
 - nightly
 before_script:
-- composer -n install
+- travis_retry composer self-update
+- travis_retry composer install --no-interaction --prefer-source --dev
 - if [[ ${TRAVIS_PHP_VERSION:0:3} == "5.6" ]]; then pecl install runkit; else pecl install uopz; fi
 - if [[ ${TRAVIS_PHP_VERSION:0:3} == "5.6" ]]; then echo "runkit.internal_override=1" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi
 - export PATH=$PATH:$PWD
-script: vendor/bin/phpunit --configuration tests/phpunit.xml
+script: vendor/bin/phpunit --configuration tests/phpunit.xml --coverage-clover=coverage.xml
+
+after_success:
+    - bash <(curl -s https://codecov.io/bash)
+
 before_deploy:
 - ant phar
 deploy:
@@ -23,4 +28,4 @@ deploy:
   on:
     tags: true
 after_deploy:
-  - ant clean
+  - ant clean