Replace deprecated phpcs sniffs with successors

- SlevomatCodingStandard.TypeHints.UnionTypeHintFormat → DNFTypeHintFormat
- Squiz.WhiteSpace.LanguageConstructSpacing → Generic.WhiteSpace.LanguageConstructSpacing

Author: koriym

phpcs.xml

@@ -47,10 +47,17 @@
         <exclude name="SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingTraversableTypeHintSpecification"/>
         <exclude name="SlevomatCodingStandard.Commenting.InlineDocCommentDeclaration.NoAssignment"/>
         <!-- /Option -->
+        <!-- Deprecated sniffs — replaced below -->
+        <exclude name="SlevomatCodingStandard.TypeHints.UnionTypeHintFormat"/>
+        <exclude name="Squiz.WhiteSpace.LanguageConstructSpacing"/>
         <!-- Exclude Fake files form Doctrine CS -->
         <exclude-pattern>*/tests/Fake/*</exclude-pattern>
     </rule>
 
+    <!-- Replacements for deprecated sniffs -->
+    <rule ref="SlevomatCodingStandard.TypeHints.DNFTypeHintFormat"/>
+    <rule ref="Generic.WhiteSpace.LanguageConstructSpacing"/>
+
     <!-- Additional Rules -->
     <rule ref="SlevomatCodingStandard.Commenting.DocCommentSpacing">
         <properties>