Relax php constraint to allow PHP 8 (#137)

* Relax php constraint to allow PHP 8

* Run tests against PHP 8.0

* Allow installing PHPUnit 9

PHPUnit has very narrow range of supported php version.
PHPUnit 7 is still needed and used for php <7.3.

* Update slevomat/coding-standard

Author: xificurk

.github/workflows/tests.yml

@@ -12,6 +12,7 @@ jobs:
           - "7.2"
           - "7.3"
           - "7.4"
+          - "8.0"
 
     steps:
       - name: "Checkout"

composer.json

@@ -17,7 +17,7 @@
 		}
 	},
 	"require": {
-		"php": "^7.1",
+		"php": ">=7.1",
 		"nikic/php-parser": "^4.4",
 		"phpstan/phpstan": "^0.12.26"
 	},
@@ -28,8 +28,8 @@
 		"phpstan/phpstan-nette": "^0.12.0",
 		"phpstan/phpstan-phpunit": "^0.12.0",
 		"phpstan/phpstan-strict-rules": "^0.12.0",
-		"phpunit/phpunit": "^7.5.6",
-		"slevomat/coding-standard": "^5.0.4",
+		"phpunit/phpunit": "^7.5.6 || ^9.4.2",
+		"slevomat/coding-standard": "^6.4.1",
 		"squizlabs/php_codesniffer": "~3.5.2"
 	},
 	"autoload": {

phpcs.xml

@@ -199,6 +199,14 @@
 					  value="@author,@created,@version,@package,@copyright,@license,@see,@since,@link"/>
 		</properties>
 	</rule>
+	<rule ref="SlevomatCodingStandard.Commenting.UselessFunctionDocComment">
+		<properties>
+			<property name="traversableTypeHints" type="array">
+				<element value="Generator"/>
+				<element value="Traversable"/>
+			</property>
+		</properties>
+	</rule>
 	<rule ref="SlevomatCodingStandard.ControlStructures.AssignmentInCondition"/>
 	<rule ref="SlevomatCodingStandard.ControlStructures.LanguageConstructWithParentheses"/>
 	<rule ref="SlevomatCodingStandard.ControlStructures.DisallowYodaComparison"/>
@@ -253,14 +261,29 @@
 		</properties>
 	</rule>
 	<rule ref="SlevomatCodingStandard.TypeHints.NullableTypeForNullDefaultValue" />
-	<rule ref="SlevomatCodingStandard.TypeHints.TypeHintDeclaration">
+	<rule ref="SlevomatCodingStandard.TypeHints.ParameterTypeHint">
+		<properties>
+			<property name="traversableTypeHints" type="array">
+				<element value="Generator"/>
+				<element value="Traversable"/>
+			</property>
+		</properties>
+	</rule>
+	<rule ref="SlevomatCodingStandard.TypeHints.PropertyTypeHint">
+		<properties>
+			<property name="traversableTypeHints" type="array">
+				<element value="Generator"/>
+				<element value="Traversable"/>
+			</property>
+			<property name="enableNativeTypeHint" value="false"/>
+		</properties>
+	</rule>
+	<rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHint">
 		<properties>
-			<property name="traversableTypeHints" type="array" value="
-				Generator,
-				Traversable,
-			"/>
-			<property name="enableEachParameterAndReturnInspection" value="1" />
-			<property name="allAnnotationsAreUseful" value="1" />
+			<property name="traversableTypeHints" type="array">
+				<element value="Generator"/>
+				<element value="Traversable"/>
+			</property>
 		</properties>
 	</rule>
 	<rule ref="SlevomatCodingStandard.TypeHints.LongTypeHints"/>