Merge branch 'release/2.1' into release/2.2

src/PackageArchive/Archive.CiServer.Patch.Compat/ArchiveBaseline.2.1.8.txt

@@ -0,0 +1,5 @@
+microsoft.aspnetcore.razor.design\2.1.1\.nupkg.metadata
+system.buffers\4.3.0\.signature.p7s
+system.collections.immutable\1.3.0\.signature.p7s
+system.diagnostics.contracts\4.3.0\.signature.p7s
+system.runtime.serialization.primitives\4.1.1\.signature.p7s

src/PackageArchive/Archive.CiServer.Patch/ArchiveBaseline.2.1.8.txt

@@ -0,0 +1,5 @@
+microsoft.aspnetcore.razor.design\2.1.1\.nupkg.metadata
+system.buffers\4.3.0\.signature.p7s
+system.collections.immutable\1.3.0\.signature.p7s
+system.diagnostics.contracts\4.3.0\.signature.p7s
+system.runtime.serialization.primitives\4.1.1\.signature.p7s