Bump ProjectDefaults from 1.0.138 to 1.0.139 in /src (#782)

Author: dependabot[bot]

src/Directory.Packages.props

@@ -18,7 +18,7 @@
     <PackageVersion Include="NUnit" Version="4.2.2" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageVersion Include="Polyfill" Version="6.14.0" />
-    <PackageVersion Include="ProjectDefaults" Version="1.0.138" />
+    <PackageVersion Include="ProjectDefaults" Version="1.0.139" />
     <PackageVersion Include="System.Data.SqlClient" Version="4.8.6" />
     <PackageVersion Include="Verify" Version="27.0.0-beta.5" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.0" />