Fixing composer plugin version constraint

Author: derhasi

composer.json

@@ -21,7 +21,7 @@
     "issues": "https://github.com/derhasi/composer-preserve-paths/issues"
   },
   "require": {
-    "composer-plugin-api": "1.0.0"
+    "composer-plugin-api": "^1.0"
   },
   "require-dev": {
     "composer/composer": "1.0.*@dev",