Copying only .toml files to destination path

To avoid copying populated project folders, especially when the
.toml file is referring to a project and not a package dependency

src/DepotDelivery.jl

@@ -51,7 +51,11 @@ function build(path::String; platform = Base.BinaryPlatforms.HostPlatform(), ver
         # Disabling precompile for non-host platforms
         precompiled ? delete!(ENV, "JULIA_PKG_PRECOMPILE_AUTO") : ENV["JULIA_PKG_PRECOMPILE_AUTO"] = "0" 
 
-        cp(path, joinpath(depot, "dev", name))  # Copy project into dev/
+        for file in filter(f -> endswith(f, ".toml"), readdir(path))
+            # Copy .toml files into dev/
+            cp(joinpath(path, file), joinpath(depot, "dev", name, file), force=true) 
+        end
+
         Pkg.activate(joinpath(depot, "dev", name))
         Pkg.instantiate(; platform, verbose)