Upgrade to Slim 4 (#328)

Author: Findus23

.gitignore

@@ -7,6 +7,7 @@
 /app/config/local.php
 /app/tmp/cache/*
 /app/tmp/logs/*
+/app/tmp/templates/*
 /docs/changelog.md
 /docs/cache/
 /docs/*/cache/

README.md

@@ -20,6 +20,8 @@ Copyright Matomo team. Do not republish, or copy, or distribute this code or con
 ```bash
 $ cd app/
 $ composer install
+$ mkdir tmp/cache
+$ mkdir tmp/templates
 $ cd public/
 $ php -S 0.0.0.0:8000
 ```

app/composer.json

@@ -5,15 +5,14 @@
         }
     },
     "require": {
-        "php": ">=5.4.0",
-        "twig/twig": "1.12.*",
-        "slim/slim": "2.*",
-        "slim/extras": "2.*",
-        "slim/views": "0.1.*",
-        "michelf/php-markdown": "1.4.1",
-        "mnapoli/front-yaml": "~1.2"
+        "php": ">=7.2.0",
+        "slim/slim": "4.*",
+        "michelf/php-markdown": "1.9.0",
+        "mnapoli/front-yaml": "~1.2",
+        "slim/psr7": "^1.0",
+        "slim/twig-view": "3.0.0",
+        "php-di/php-di": "^6.0",
+        "ext-json": "*"
     },
-    "require-dev": {
-        "phpunit/phpunit": "~4.0"
-    }
+    "require-dev": {}
 }