Update composer.json in order to whitelist development versions ins…

…tead to set "minimum-stability"

README.md

@@ -20,15 +20,15 @@ for your setup.
 After that you can create the project:
 
 ```
-composer create-project drupal-composer/drupal-project:8.x-dev some-dir --no-interaction
+composer create-project drupal-composer/drupal-project:^8.0@dev some-dir --no-interaction
 ```
 
 With `composer require ...` you can download new dependencies to your
 installation.
 
 ```
 cd some-dir
-composer require drupal/devel:~1.0
+composer require drupal/devel:^1.0
 ```
 
 The `composer create-project` command passes ownership of all files to the

composer.json

@@ -16,26 +16,28 @@
         }
     ],
     "require": {
-        "php": ">=7.0.8",
+        "php": "^7.0.8",
         "composer/installers": "^1.2",
         "cweagans/composer-patches": "^1.6.5",
         "drupal-composer/drupal-scaffold": "^2.5",
         "drupal/console": "^1.0.2",
-        "drupal/core": "^8.7.0",
-        "drush/drush": "^9.0.0",
+        "drupal/core": "^8.7",
+        "drush/drush": "^9",
         "vlucas/phpdotenv": "^2.4",
-        "webflo/drupal-finder": "^1.0.0",
+        "webflo/drupal-finder": "^1",
         "webmozart/path-util": "^2.3",
-        "zaporylie/composer-drupal-optimizations": "^1.0"
+        "zaporylie/composer-drupal-optimizations": "^1"
     },
     "require-dev": {
-        "webflo/drupal-core-require-dev": "^8.7.0"
+        "behat/mink": "^1.7@dev",
+        "behat/mink-selenium2-driver": "^1.3@dev",
+        "friendsofphp/php-cs-fixer": "^2.15",
+        "phpunit/phpunit": "^6.5",
+        "webflo/drupal-core-require-dev": "^8.7"
     },
     "conflict": {
         "drupal/drupal": "*"
     },
-    "minimum-stability": "dev",
-    "prefer-stable": true,
     "config": {
         "sort-packages": true
     },