Add missing compat entries

Author: mtfishman

Project.toml

@@ -61,10 +61,12 @@ NamedGraphs = "0.1.20"
 Observers = "0.2"
 PackageExtensionCompat = "1"
 Requires = "1.3"
+SerializedElementArrays = "0.1"
 SimpleTraits = "0.9"
 SparseArrayKit = "0.2.1"
 SplitApplyCombine = "1.2"
 StaticArrays = "1.5.12"
+StructWalk = "0.2"
 Suppressor = "0.2"
 TimerOutputs = "0.5.22"
 TupleTools = "1.4"