Dropped unstable stuff

Author: PeeHaa

composer.json

@@ -1,7 +1,7 @@
 {
     "name": "codecollab/encryption",
     "description": "Encryption package of the CodeCollab project",
-    "version": "1.0.1",
+    "version": "1.0.2",
     "type": "library",
     "keywords": ["codecollab", "rijndael", "encryption", "security"],
     "homepage": "https://github.com/CodeCollab/Encryption",
@@ -15,12 +15,11 @@
     "autoload": {
         "psr-4": {"CodeCollab\\Encryption\\": "src/"}
     },
-    "minimum-stability": "dev",
     "require": {
-        "php": ">=7.0-dev",
+        "php": "7.0.*",
         "defuse/php-encryption": "1.2.*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5"
+        "phpunit/phpunit": "5.1.*"
     }
 }