Updated to PHP 7.2 and PHP 7.3 compat

Updates doctrine/orm to 2.6.3 and ocramius/proxy-manager to 2.2.2.

.travis.yml

@@ -1,8 +1,8 @@
 language: php
 
 php:
-  - 7.1
   - 7.2
+  - 7.3
 
 sudo: false
 
@@ -23,7 +23,7 @@ notifications:
 jobs:
     include:
     - stage: lint
-      php: 7.2
+      php: 7.3
       install:
       - composer install && ant -f build/build.xml -Dapp.host=localhost -Ddb.user=travis -Ddb.host=127.0.0.1 -Ddb.name=shopware build-unit && curl -s -L "https://github.com/phpstan/phpstan/releases/download/0.10.5/phpstan.phar" > phpstan.phar && chmod +x phpstan.phar
       script:

composer.json

@@ -16,7 +16,7 @@
         "issues": "https://issues.shopware.com"
     },
     "require": {
-        "php": "^7.1",
+        "php": "^7.2",
         "ext-ctype": "*",
         "ext-curl": "*",
         "ext-date": "*",
@@ -52,11 +52,11 @@
         "symfony/expression-language": "3.4.21",
         "symfony/web-link": "3.4.21",
         "monolog/monolog": "1.23.0",
-        "doctrine/common": "2.7.3",
-        "doctrine/collections": "1.4.0",
-        "doctrine/dbal": "2.5.13",
-        "doctrine/orm": "2.5.14",
-        "doctrine/cache": "1.6.2",
+        "doctrine/common": "2.10.0",
+        "doctrine/collections": "1.5.0",
+        "doctrine/dbal": "2.6.3",
+        "doctrine/orm": "2.6.3",
+        "doctrine/cache": "1.8.0",
         "beberlei/assert": "2.9.2",
         "zendframework/zend-escaper": "2.5.2",
         "oyejorge/less.php": "1.7.0.14",
@@ -70,7 +70,7 @@
         "ramsey/uuid": "3.5.2",
         "setasign/fpdf": "1.8.1",
         "setasign/fpdi": "1.6.2",
-        "ocramius/proxy-manager": "1.0.2",
+        "ocramius/proxy-manager": "2.2.2",
         "mpdf/mpdf": "7.0.3",
         "php-http/curl-client": "1.7.1",
         "guzzlehttp/psr7": "1.4.2",
@@ -131,7 +131,7 @@
         "autoloader-suffix": "Shopware",
         "optimize-autoloader": true,
         "platform": {
-            "php": "7.1.0"
+            "php": "7.2.0"
         }
     },
     "scripts": {