Add up_deps script

.dev/up_deps.jl

@@ -0,0 +1,29 @@
+#=
+A simple script for updating the manifest
+files in all of our environments.
+=#
+
+root = dirname(@__DIR__)
+dirs = (
+    root,
+    joinpath(root, ".dev"),
+    joinpath(root, "test"),
+    joinpath(root, "perf"),
+    joinpath(root, "docs"),
+    joinpath(root, "gpuenv"),
+)
+
+cd(root) do
+    for dir in dirs
+        @info "Pkg.up for environment $dir"
+        cmd = `$(Base.julia_cmd()) --project=$dir -e 'import Pkg; Pkg.update()'`
+        run(cmd)
+    end
+end
+
+# https://github.com/JuliaLang/Pkg.jl/issues/3014
+for dir in dirs
+    cd(dir) do
+        rm("LocalPreferences.toml"; force = true)
+    end
+end