adjust puli dependencies

Author: dbu

composer.json

@@ -13,8 +13,8 @@
     "require": {
         "php": "^5.4|7.*",
         "puli/composer-plugin": "~1.0.0-beta8",
-        "puli/discovery": "~1.0.0-beta8",
-        "puli/cli": "~1.0.0-beta9"
+        "puli/discovery": "1.0.0-beta8",
+        "puli/cli": "~1.0.0-beta9@dev"
     },
     "require-dev": {
         "php-http/httplug": "1.0.0-beta",