Updated to a pluggable architecture

Author: gplanchat

composer.json

@@ -26,8 +26,7 @@
         "phpunit/phpunit": "^9.0",
         "php-etl/csv-flow": "^0.2.0",
         "php-etl/phpunit-extension": "^0.2.0",
-        "php-etl/bucket-contracts": "^0.1.0",
-        "php-etl/pipeline-contracts": "^0.2.0"
+        "php-etl/bucket-contracts": "^0.1.0"
     },
     "autoload": {
         "psr-4": {