Update to Cadence v1.0.0-preview.1

[SupunS]

Description

Updating to cadence https://github.com/onflow/cadence/releases/tag/v1.0.0-preview.1

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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

Patch and project coverage have no change.

Comparison is base (0781e44) 38.43% compared to head (cc088ff) 38.43%.

Additional details and impacted files

@@                   Coverage Diff                   @@
##           feature/stable-cadence    #1207   +/-   ##
=======================================================
  Coverage                   38.43%   38.43%           
=======================================================
  Files                          38       38           
  Lines                        1941     1941           
=======================================================
  Hits                          746      746           
  Misses                       1107     1107           
  Partials                       88       88           

Flag	Coverage Δ
unittests	38.43% <ø> (ø)

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