Validate composer.json

Author: sebastiaanluca

.travis.yml

@@ -24,6 +24,7 @@ matrix:
   fast_finish: true
 
 before_install:
+  - composer validate --strict
   - travis_retry composer self-update
   - if [[ -n ${MINIMUM_STABILITY} ]]; then composer config minimum-stability ${MINIMUM_STABILITY}; echo "Minimum stability set to ${MINIMUM_STABILITY}"; else echo "Minimum stability left unchanged"; fi
   - if [[ -n ${ORCHESTRA_VERSION} ]]; then composer require orchestra/testbench=${ORCHESTRA_VERSION} --dev --no-update; else echo "orchestra/testbench version requirement left unchanged"; fi