Release 4.2.0

[cmichi]

Added

• Persist Environment in metadata ‒ #1741
• Added possibility for runtime_call in E2E tests ‒ #1736
• Added default attribute to constructors and messages ‒ #1724
• Added clarification about Mapping::size unit ‒ #1735

Changed

• Upgraded syn to version 2 ‒ #1731
• Update scale-info requirement to 2.5 ‒ #1733
• Bump subxt to 0.28.0 ‒ #1750

[HCastano]

🍪

[codecov-commenter]

Codecov Report

Merging #1758 (feb624e) into master (6fda344) will not change coverage.
The diff coverage is n/a.

❗ Current head feb624e differs from pull request most recent head f915ec9. Consider uploading reports for the commit f915ec9 to get more accurate results

@@           Coverage Diff           @@
##           master    #1758   +/-   ##
=======================================
  Coverage   70.74%   70.74%           
=======================================
  Files         207      207           
  Lines        6617     6617           
=======================================
  Hits         4681     4681           
  Misses       1936     1936           

see 1 file with indirect coverage changes

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