added sniffs for php 8

Author: vossik

InfinityloopCodingStandard/ruleset.xml

@@ -308,6 +308,7 @@
             </property>
         </properties>
     </rule>
+    <rule ref="SlevomatCodingStandard.Classes.RequireConstructorPropertyPromotion"/>
     <rule ref="SlevomatCodingStandard.Commenting.EmptyComment"/>
     <rule ref="SlevomatCodingStandard.Commenting.InlineDocCommentDeclaration"/>
     <rule ref="SlevomatCodingStandard.Commenting.UselessInheritDocComment"/>
@@ -389,8 +390,10 @@
         </properties>
     </rule>
     <rule ref="SlevomatCodingStandard.ControlStructures.RequireNullCoalesceEqualOperator"/>
+    <rule ref="SlevomatCodingStandard.ControlStructures.RequireNullSafeObjectOperator"/>
     <rule ref="SlevomatCodingStandard.Exceptions.DeadCatch"/>
     <rule ref="SlevomatCodingStandard.Exceptions.ReferenceThrowableOnly"/>
+    <rule ref="SlevomatCodingStandard.Exceptions.RequireNonCapturingCatch"/>
     <rule ref="SlevomatCodingStandard.Namespaces.AlphabeticallySortedUses">
         <properties>
             <property name="psr12Compatible" value="true"/>
@@ -455,6 +458,13 @@
     <rule ref="SlevomatCodingStandard.TypeHints.NullTypeHintOnLastPosition"/>
     <rule ref="SlevomatCodingStandard.TypeHints.DisallowArrayTypeHintSyntax"/>
     <rule ref="SlevomatCodingStandard.TypeHints.PropertyTypeHintSpacing"/>
+    <rule ref="SlevomatCodingStandard.TypeHints.UnionTypeHintFormat">
+        <properties>
+            <property name="withSpaces" value="no"/>
+            <property name="shortNullable" value="yes"/>
+            <property name="nullPosition" value="last"/>
+        </properties>
+    </rule>
     <rule ref="SlevomatCodingStandard.Arrays.DisallowImplicitArrayCreation"/>
     <rule ref="SlevomatCodingStandard.Arrays.TrailingArrayComma">
         <properties>
@@ -469,6 +479,7 @@
     <rule ref="SlevomatCodingStandard.Functions.UselessParameterDefaultValue"/>
     <rule ref="SlevomatCodingStandard.Functions.UnusedInheritedVariablePassedToClosure"/>
     <rule ref="SlevomatCodingStandard.Functions.RequireTrailingCommaInCall"/>
+    <rule ref="SlevomatCodingStandard.Functions.RequireTrailingCommaInDeclaration"/>
     <rule ref="SlevomatCodingStandard.Numbers.DisallowNumericLiteralSeparator"/>
     <rule ref="SlevomatCodingStandard.Operators.DisallowEqualOperators"/>
     <rule ref="SlevomatCodingStandard.Operators.RequireCombinedAssignmentOperator"/>