Upgrade PHPStan to major release 1.

Need code refactoring : cope with #81

.github/workflows/phyxo.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-versions: [7.3, 7.4, 8.0]
+        php-versions: [7.4, 8.0]
         # experimental: [false]
         mysql: [5.7]
         # include:

composer.json

@@ -18,6 +18,8 @@
         "friendsofphp/php-cs-fixer": "^3.2",
         "openpsa/universalfeedcreator": "^1.8",
         "pclzip/pclzip": "^2.8",
+        "phpstan/phpstan": "^1.1",
+        "phpstan/phpstan-doctrine": "^1.0",
         "ramsey/uuid-doctrine": "^1.6",
         "symfony/asset": "4.4.*",
         "symfony/console": "4.4.*",
@@ -44,8 +46,6 @@
         "dmore/behat-chrome-extension": "^1.3",
         "phpspec/prophecy": "^1.11",
         "phpstan/extension-installer": "^1.0",
-        "phpstan/phpstan": "^0.12.42",
-        "phpstan/phpstan-doctrine": "^0.12.19",
         "symfony/browser-kit": "^4.4",
         "symfony/css-selector": "^4.4",
         "symfony/maker-bundle": "^1.21",