Sign with the 1.0 release of the signing tool

[virzak]

sign-universal dropped its alpha suffix. 1.0.32 is the first stable release - same tool, same sign-universal command, same flags.

Verified before opening: dotnet dnx SignUniversal.Cli -- --version (no version, no --prerelease) resolves 1.0.32+dde324a35c, matching the release commit.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.90%. Comparing base (2602bd2) to head (7d1af55).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #157   +/-   ##
=======================================
  Coverage   93.90%   93.90%           
=======================================
  Files           9        9           
  Lines        1576     1576           
  Branches      363      363           
=======================================
  Hits         1480     1480           
  Misses         25       25           
  Partials       71       71           

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