Bump Xamarin.Essentials from 1.8.0 to 1.8.1

Bumps [Xamarin.Essentials](https://github.com/xamarin/Essentials) from 1.8.0 to 1.8.1.
- [Release notes](https://github.com/xamarin/Essentials/releases)
- [Commits](xamarin/Essentials@1.8.0...1.8.1)

---
updated-dependencies:
- dependency-name: Xamarin.Essentials
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Directory.Build.props

@@ -49,7 +49,7 @@
   <ItemGroup>
     <!--<Compile Update="**\*.cs" DependentUpon="I%(Filename).cs" />-->
     <PackageReference Include="Nerdbank.GitVersioning" Version="3.6.133" PrivateAssets="all" Condition="!Exists('packages.config')" />
-    <PackageReference Include="stylecop.analyzers" Version="1.2.0-beta.507" PrivateAssets="all" />
+    <PackageReference Include="stylecop.analyzers" Version="1.2.0-beta.556" PrivateAssets="all" />
     <PackageReference Include="Roslynator.Analyzers" Version="4.7.0" PrivateAssets="All" />
     <AdditionalFiles Include="$(MSBuildThisFileDirectory)stylecop.json" Link="stylecop.json" />
   </ItemGroup>

src/CrissCross.XamForms.Test/CrissCross.XamForms.Test/CrissCross.XamForms.Test.csproj

@@ -12,7 +12,7 @@
 
   <ItemGroup>
     <PackageReference Include="ReactiveUI.Fody" Version="$(ReactiveUIVersion)" />
-    <PackageReference Include="Xamarin.Essentials" Version="1.8.0" />
+    <PackageReference Include="Xamarin.Essentials" Version="1.8.1" />
   </ItemGroup>
 
   <ItemGroup>