update metadata

Author: modethirteen

README.md

@@ -9,8 +9,8 @@ A utility for traversing PHP arrays with an XPath-like syntax.
 
 ## Requirements
 
-* PHP 7.2+ (php72, 1.x)
-* PHP 7.4+ (main, 2.x)
+* PHP 7.2, 7.3, 7.4 (1.x)
+* PHP 7.4 (main, 2.x)
 
 ## Installation
 

composer.json

@@ -14,12 +14,12 @@
     "issues": "https://github.com/modethirteen/XArray.php/issues"
   },
   "require": {
-    "php": ">=7.2.0",
+    "php": "~7.2.0",
     "ext-json": "*"
   },
   "require-dev": {
-    "phpstan/phpstan": "~0.12",
-    "phpunit/phpunit": "~7.4.3"
+    "phpstan/phpstan": "~0.12.0",
+    "phpunit/phpunit": "~7.4.0"
   },
   "autoload": {
     "psr-4": {