Upgrade phpstan and codesniffer (#31)

Makefile

@@ -12,7 +12,7 @@ csf:
 	vendor/bin/phpcbf --standard=ruleset.xml --extensions=php,phpt --tab-width=4 --ignore=temp -sp src tests
 
 phpstan:
-	vendor/bin/phpstan analyse -l max -c phpstan.neon --memory-limit=512M src
+	vendor/bin/phpstan analyse -c phpstan.neon --memory-limit=512M
 
 tests:
 	vendor/bin/tester -s -p php --colors 1 -C tests

composer.json

@@ -44,9 +44,9 @@
     "nette/tester": "^2.4.0",
     "tracy/tracy": "^2.8.0",
     "mockery/mockery": "^1.3.0",
-    "phpstan/phpstan": "^0.12",
-    "phpstan/phpstan-strict-rules": "^0.12",
-    "ninjify/coding-standard": "^0.12"
+    "phpstan/phpstan": "^1.0",
+    "phpstan/phpstan-strict-rules": "^1.0",
+    "ninjify/coding-standard": "^0.11"
   },
   "prefer-stable": true,
   "minimum-stability": "dev",

phpstan.neon

@@ -2,6 +2,9 @@ includes:
 	- ./vendor/phpstan/phpstan-strict-rules/rules.neon
 
 parameters:
+	level: 8
+	paths:
+		- src
 	ignoreErrors:
 		- '#^Strict comparison using === between string and null will always evaluate to false.$#'
 		- '#^Parameter \#1 \$sql of method Nette\\Database\\Explorer::query\(\) expects literal-string, mixed given.$#'