Update to latest stable cadence

[SupunS]

Description

Updating to cadence onflow/cadence@ec4d615

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For contributor use:

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (feature/stable-cadence@cc680ac). Click here to learn what that means.
Patch has no changes to coverable lines.

Additional details and impacted files

@@                    Coverage Diff                    @@
##             feature/stable-cadence    #1204   +/-   ##
=========================================================
  Coverage                          ?   38.43%           
=========================================================
  Files                             ?       38           
  Lines                             ?     1941           
  Branches                          ?        0           
=========================================================
  Hits                              ?      746           
  Misses                            ?     1107           
  Partials                          ?       88           

Flag	Coverage Δ
unittests	38.43% <0.00%> (?)

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