Run test commands individually on Travis CI

Using Composer's run-script to run all the commands together appears to
be encountering a segfault at some point, and it is difficult to debug,
since it seems to be intermittent.

.travis.yml

@@ -61,7 +61,9 @@ before_script:
   - mkdir -p build/logs
 
 script:
-  - travis_wait ./resources/scripts/cmd-proxy.sh composer run-script --timeout=1200 test-ci
+  - ./resources/scripts/cmd-proxy.sh ./vendor/bin/parallel-lint src tests
+  - ./resources/scripts/cmd-proxy.sh ./vendor/bin/phpcs src tests --standard=psr2 -sp --colors
+  - travis_wait ./resources/scripts/cmd-proxy.sh ./vendor/bin/phpunit --verbose --coverage-clover build/logs/clover.xml
 
 after_success:
   - travis_retry ./resources/scripts/cmd-proxy.sh ./resources/scripts/php-coveralls.sh

composer.json

@@ -76,17 +76,11 @@
         "lint": "parallel-lint src tests",
         "phpcs": "phpcs src tests --standard=psr2 -sp --colors",
         "phpunit": "phpunit --verbose --colors=always",
-        "phpunit-ci": "phpunit --verbose --coverage-clover build/logs/clover.xml",
         "phpunit-coverage": "phpunit --verbose --colors=always --coverage-html build/coverage",
         "test": [
             "@lint",
             "@phpcs",
             "@phpunit"
-        ],
-        "test-ci": [
-            "@lint",
-            "@phpcs",
-            "@phpunit-ci"
         ]
     },
     "support": {