Reduce the severity of 'Introduce optional parameters' for non-private members to Hint level, because they tend to cause backwards-compatibility issues in publicly exposed signatures

Author: bkoelman

JsonApiDotNetCore.sln.DotSettings

@@ -54,6 +54,7 @@ JsonApiDotNetCore.ArgumentGuard.NotNull($EXPR$, $NAME$);</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=EnforceUsingStatementBraces/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=EnforceWhileStatementBraces/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=EventNeverSubscribedTo_002ELocal/@EntryIndexedValue">WARNING</s:String>
+	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=IntroduceOptionalParameters_002EGlobal/@EntryIndexedValue">HINT</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=LambdaExpressionMustBeStatic/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=LocalizableElement/@EntryIndexedValue">DO_NOT_SHOW</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=LoopCanBePartlyConvertedToQuery/@EntryIndexedValue">HINT</s:String>

WarningSeverities.DotSettings

@@ -87,7 +87,6 @@
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=ForCanBeConvertedToForeach/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=IncorrectBlankLinesNearBraces/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=InlineOutVariableDeclaration/@EntryIndexedValue">WARNING</s:String>
-	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=IntroduceOptionalParameters_002EGlobal/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=IntroduceOptionalParameters_002ELocal/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=InvokeAsExtensionMethod/@EntryIndexedValue">WARNING</s:String>
 	<s:String x:Key="/Default/CodeInspection/Highlighting/InspectionSeverities/=JoinDeclarationAndInitializer/@EntryIndexedValue">WARNING</s:String>