Make decode function return SConstant by default instead of the decoded data

[arobsn]

Fixes #123

[changeset-bot]

🦋 Changeset detected

Latest commit: 19962ee

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 8 packages

Name	Type
@fleet-sdk/core	Minor
@fleet-sdk/serializer	Minor
@fleet-sdk/blockchain-providers	Minor
@fleet-sdk/compiler	Minor
@fleet-sdk/mock-chain	Minor
@fleet-sdk/wallet	Minor
@fleet-sdk/ageusd-plugin	Patch
@fleet-sdk/babel-fees-plugin	Patch

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (72391e7) to head (19962ee).
Report is 21 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #145   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          122       122           
  Lines        13531     13514   -17     
  Branches      1590      1584    -6     
=========================================
- Hits         13531     13514   -17     

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