Updated converters/p5-Sereal-Encoder to 2.03

2.03 Tue Jan  7 20:00 2014 (AMS time)
  - (Hopefully) final fixes to FREEZE/THAW functionality:
    => Add safe assertion to make sure that we don't segfault on invalid
       data.
    => Fix encoding/decoding of data structures with repeated references
       to the same instance of a class that has FREEZE/THAW hooks.
       Thanks to Christian Hansen for a test case.
  - Distribution dependency fix.

2.02 Mon Jan  6 15:00 2014 (AMS time)
  - Fundamental fixes for FREEZE/THAW support in previous Sereal v2
    releases. If you plan to use FREEZE/THAW, make sure you have 2.02
    or better (dito for the decoder).

2.01 Tue Dec 31 08:15 2013 (AMS time)
  - Promoting changes from 0.37 to 2.00_03 to a stable release.
    (This being the first protocol v2 stable release.)
  - Minor performance tweaks.

2.00_03 Sun Dec 29 10:33 2013 (AMS time)
  - FREEZE/THAW hooks for object serialization.
  - Test improvements (allowing for partial parallel run)
  - Minor optimizations.

2.00_02 Mon Oct 28 19:32 2013 (AMS time)
  - Sereal::Encoder now requires Sereal::Decoder for better testing.
  - Fix Test::Warn dependency problem of 2.00_01.

2.00_01 tue Oct 1 07:34 2013 (AMS time)
  - NEW PROTOCOL VERSION: V2
  - User-data in header functionality: You may embed arbitrary
    Sereal-serializable data in a document header. The document
    header isn't compressed, so this is ideal for retrieving
    small chunks of meta-data (eg. routing information) without
    having to deserialize the entire document.
  - Relocatable Sereal document bodies
  - Encoder never emits non-incremental Snappy encoding for V2
  - Offsets now 1-based in relocatable format, not 0
  - Fixed VERY obscure (and rare) memory leak.
  - Improved error messages
  - Remove warning about Sereal not being production-grade
    (because it IS).
  - Detect when the Snappy compression was net negative in size
    and back out
  - C89/Windows fixes (bulk88)
  - 5.18 compat: Skip test failing due to hash-randomization (Zefram)


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