Update Preserves submodule

preserves

@@ -1 +1 @@
-Subproject commit f408708887e227ba8f67133cf03095890edbd8f9
+Subproject commit ea50b05bada73dc421227ecbff2b50e35971025f

src/syndicate/sturdy.nim

@@ -1,7 +1,10 @@
-import preserves, preserves/parse
+# SPDX-FileCopyrightText: ☭ 2021 Emery Hemingway
+# SPDX-License-Identifier: Unlicense
+
+import preserves
 import ../syndicate/protocols/schemas/sturdy, ./private/hmacs
 
-proc mint*(key: openarray[byte]; oid: Value): SturdyRef =
+proc mint*(key: openarray[byte]; oid: Preserve): SturdyRef =
   SturdyRef(oid: oid, sig: hmacSha256(key, encode(oid), key.len))
 
 proc attenuate*(r: SturdyRef; caveats: Attenuation): SturdyRef =
@@ -19,10 +22,11 @@ proc validate*(key: openarray[byte]; r: SturdyRef): bool =
 
 when isMainModule:
   import unittest
-  test "mint":
+  import preserves/parse
+  test "sturdy":
     var
       key: array[16, byte]
-      oid = "syndicate".toPreserve(EmbeddedType)
+      oid = "syndicate".toPreserve
       sRef = mint(key, oid)
       control = parsePreserves"""<ref "syndicate" [] #[pkgN9TBmEd3Q04grVG4Zdw]>"""
     check(sRef.toPreserve == control)