Bump coverlet.msbuild from 2.9.0 to 3.0.0 (#497)

Author: dependabot[bot]

Directory.Build.targets

@@ -35,7 +35,7 @@
         <PackageReference Update="Serilog.Sinks.XUnit" Version="2.0.4" />
         <PackageReference Update="XunitXml.TestLogger" Version="2.1.26" />
         <PackageReference Update="coverlet.collector" Version="1.3.0" />
-        <PackageReference Update="coverlet.msbuild" Version="2.9.0" />
+        <PackageReference Update="coverlet.msbuild" Version="3.0.0" />
         <PackageReference Update="System.Reactive" Version="4.4.1" />
         <PackageReference Update="System.Collections.Immutable" Version="1.7.1" />
         <PackageReference Update="Microsoft.Reactive.Testing" Version="4.4.1" />