Release-candidate v0.68.1-rc.1

[jansegre]

Changes

• fix(nano): runtime type restriction for emit_event syscall #1506
• fix(nano): state API regression when requesting dict fields #1507

Checklist

• I've read and followed the release candidate process described in https://github.com/HathorNetwork/ops-tools/blob/master/docs/release-guides/hathor-core.md#release-candidate
• I confirm this release candidate only includes production-ready changes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.26%. Comparing base (4615e9a) to head (94d7135).
⚠️ Report is 4 commits behind head on release-candidate.

Additional details and impacted files

@@                  Coverage Diff                  @@
##           release-candidate    #1508      +/-   ##
=====================================================
+ Coverage              86.24%   86.26%   +0.02%     
=====================================================
  Files                    440      440              
  Lines                  34055    34063       +8     
  Branches                5326     5328       +2     
=====================================================
+ Hits                   29371    29386      +15     
+ Misses                  3664     3660       -4     
+ Partials                1020     1017       -3     

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