Keep space before colon for return type hint

Author: simPod

src/Cdn77/ruleset.xml

@@ -95,6 +95,12 @@
     <rule ref="SlevomatCodingStandard.Commenting.RequireOneLineDocComment"/>
     <rule ref="SlevomatCodingStandard.Files.LineLength"/>
 
+    <rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHintSpacing">
+        <properties>
+            <property name="spacesCountBeforeColon" value="1"/>
+        </properties>
+    </rule>
+
     <rule ref="Squiz.WhiteSpace.OperatorSpacing">
         <properties>
             <property name="ignoreNewlines" value="true"/>