Bump Microsoft.NET.StringTools from 17.11.48 to 18.0.2

---
updated-dependencies:
- dependency-name: Microsoft.NET.StringTools
  dependency-version: 18.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: Microsoft.NET.StringTools
  dependency-version: 18.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/ProjectDiff.Core/ProjectDiff.Core.csproj

@@ -30,6 +30,7 @@
     </ItemGroup>
 
     <ItemGroup>
+      <PackageReference Include="Microsoft.NET.StringTools" Version="18.0.2" />
         <None Include="README.md" Pack="true" PackagePath="\"/>
     </ItemGroup>
 </Project>

src/dotnet-proj-diff/dotnet-proj-diff.csproj

@@ -16,7 +16,7 @@
         <PackageReference Include="Microsoft.Build" Version="17.11.48" ExcludeAssets="runtime"/>
         <PackageReference Include="Microsoft.Build.Framework" Version="17.11.48" ExcludeAssets="runtime"/>
         <PackageReference Include="Microsoft.Build.Utilities.Core" Version="17.11.48" ExcludeAssets="runtime"/>
-        <PackageReference Include="Microsoft.NET.StringTools" Version="17.11.48" ExcludeAssets="runtime"/>
+        <PackageReference Include="Microsoft.NET.StringTools" Version="18.0.2" ExcludeAssets="runtime"/>
 
         <PackageReference Include="Microsoft.Build.Locator" Version="1.11.2" />
         <PackageReference Include="Microsoft.Extensions.FileSystemGlobbing" Version="10.0.1" />

test/ProjectDiff.Tests/ProjectDiff.Tests.csproj

@@ -12,7 +12,7 @@
         <PackageReference Include="Microsoft.Build" Version="17.11.48" ExcludeAssets="runtime"/>
         <PackageReference Include="Microsoft.Build.Framework" Version="17.11.48" ExcludeAssets="runtime"/>
         <PackageReference Include="Microsoft.Build.Utilities.Core" Version="17.11.48" ExcludeAssets="runtime"/>
-        <PackageReference Include="Microsoft.NET.StringTools" Version="17.11.48" ExcludeAssets="runtime"/>
+        <PackageReference Include="Microsoft.NET.StringTools" Version="18.0.2" ExcludeAssets="runtime"/>
 
         <PackageReference Include="coverlet.collector" Version="6.0.4"/>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />