openpgp: Introduce explicit packet versions, move enum SKESK.

  - This patch makes packet::skesk public, exports the SKESK4 and
    SKESK5 type there, and moves the SKESK enum to packet.

  - This is a clean and faithful way to represent packet versions.  It
    allows us to cleanly support future versions, and offer partial
    support for older versions.  Parsing and understanding old
    versions allows Sequoia to be used to access archived information.

  - This is the first of a series of patches that introduces explicit
    packet versions for all packet types in the form of enums like the
    SKESK enum.

  - See #228.

1 files changed, 1 insertions, 1 deletions

diff --git a/openpgp/src/message/mod.rs b/openpgp/src/message/mod.rs
index 883b8465..66b735f0 100644
--- a/openpgp/src/message/mod.rs
+++ b/openpgp/src/message/mod.rs
@@ -410,7 +410,7 @@ mod tests {
     use packet::CompressedData;
     use packet::Literal;
     use packet::OnePassSig;
-    use packet::SKESK4;
+    use packet::skesk::SKESK4;
     use packet::PKESK;
     use packet::SEIP;
     use packet::MDC;