[TASK] Add some Composer settings

- prefer packages over Git
- sort the dependencies

Also actually sort the dependencies.

Author: oliverklee

composer.json

@@ -27,8 +27,8 @@
         "ext-iconv": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.5.36",
-        "codacy/coverage": "^1.4.3"
+        "codacy/coverage": "^1.4.3",
+        "phpunit/phpunit": "^8.5.36"
     },
     "suggest": {
         "ext-mbstring": "for parsing UTF-8 CSS"
@@ -43,6 +43,12 @@
             "Sabberworm\\CSS\\Tests\\": "tests/"
         }
     },
+    "config": {
+        "preferred-install": {
+            "*": "dist"
+        },
+        "sort-packages": true
+    },
     "extra": {
         "branch-alias": {
             "dev-master": "9.0.x-dev"