Correct PHP dependency information (closes #8)

README.md

@@ -11,7 +11,7 @@ A household needs to be managed. I did this so far (almost 10 years) with my fir
 For now my main focus is on stock management, ERP your fridge!
 
 ## How to install
-Just unpack the [latest release](https://github.com/berrnd/grocy/releases/latest) on your PHP (7.0 or later required) enabled webserver (webservers root should point to the `/public` directory), copy `config-dist.php` to `data/config.php`, edit it to your needs, ensure that the `data` directory is writable and you're ready to go.
+Just unpack the [latest release](https://github.com/berrnd/grocy/releases/latest) on your PHP (currently only tested with PHP 7.2) enabled webserver (webservers root should point to the `/public` directory), copy `config-dist.php` to `data/config.php`, edit it to your needs, ensure that the `data` directory is writable and you're ready to go.
 
 Default login is user `admin` with password `admin` - see the `data/config.php` file. Alternatively clone this repository and install Composer and Bower dependencies manually.
 

composer.json

@@ -1,6 +1,6 @@
 {
 	"require": {
-		"php": ">=7.0",
+		"php": ">=7.2",
 		"slim/slim": "^3.8",
 		"morris/lessql": "^0.3.4",
 		"pavlakis/slim-cli": "^1.0",