Test on PHP 7.1 (#79)

Test on PHP 7.1

Author: GrahamCampbell

.travis.yml

@@ -10,6 +10,7 @@ php:
     - 5.5
     - 5.6
     - 7.0
+    - 7.1
     - hhvm
 
 env:
@@ -30,7 +31,7 @@ matrix:
           env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" COVERAGE=true TEST_COMMAND="composer test-ci" PULI_VERSION=1.0.0-beta9
 
 before_install:
-    - if [[ $COVERAGE != true && $TRAVIS_PHP_VERSION != hhvm ]]; then phpenv config-rm xdebug.ini; fi
+    - if [[ $COVERAGE != true ]]; then phpenv config-rm xdebug.ini || true; fi
 
 install:
     - wget https://github.com/puli/cli/releases/download/1.0.0-beta10/puli.phar && chmod +x puli.phar