Bumped DocumentFormat.OpenXml from 2.17.1 to 2.18.0

Author: seeste

ClosedXML.Examples/ClosedXML.Examples.csproj

@@ -17,7 +17,7 @@
 
 	<ItemGroup>
 		<ProjectReference Include="..\ClosedXML\ClosedXML.csproj" />
-		<PackageReference Include="DocumentFormat.OpenXml" Version="2.17.1" />
+		<PackageReference Include="DocumentFormat.OpenXml" Version="2.18.0" />
 		<PackageReference Include="morelinq" Version="3.3.2" />
 		<PackageReference Include="SonarAnalyzer.CSharp" Version="8.44.0.52574">
 		  <PrivateAssets>all</PrivateAssets>

ClosedXML/ClosedXML.csproj

@@ -47,7 +47,7 @@
 		<None Include="Product.png" Pack="true" PackagePath="\" />
 	</ItemGroup>
 	<ItemGroup>
-		<PackageReference Include="DocumentFormat.OpenXml" Version="2.17.1" />
+		<PackageReference Include="DocumentFormat.OpenXml" Version="2.18.0" />
 		<PackageReference Include="ExcelNumberFormat" Version="1.1.0" />
 		<PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1">
 		  <PrivateAssets>all</PrivateAssets>