Improve PHPStan coverage.

composer.json

@@ -103,7 +103,7 @@
             ],
             "pre-push": [
                 "vendor/bin/php-cs-fixer fix .",
-                "make test"
+                "vendor/bin/phpstan analyse"
             ],
             "post-merge": "composer install --ignore-platform-reqs"
         }

phpstan.neon.dist

@@ -0,0 +1,17 @@
+includes:
+  - vendor/phpstan/phpstan-deprecation-rules/rules.neon
+  - vendor/phpstan/phpstan-symfony/extension.neon
+  - vendor/phpstan/phpstan-phpunit/extension.neon
+  - vendor/phpstan/phpstan-phpunit/rules.neon
+  - vendor/thecodingmachine/phpstan-strict-rules/phpstan-strict-rules.neon
+  - vendor/slam/phpstan-extensions/conf/slam-rules.neon
+
+parameters:
+    level: 1
+    bootstrapFiles:
+        - teststrap.php
+    paths:
+        - bin/
+        - src/
+        - tests/
+

teststrap.php

@@ -0,0 +1,2 @@
+<?php
+define("APP_ROOT", __DIR__);