Release/7.7.0

[deandreamatias]

Solution description

• Update version

To Do

• Read contributing guide
• Check the original issue to confirm it is fully satisfied
• Add solution description to help guide reviewers
• Add unit test to verify new or fixed behaviour
• If apply, add documentation to code properties and package readme

[codecov]

Codecov Report

Merging #1122 (4e7fcd8) into main (31d2f35) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1122   +/-   ##
=======================================
  Coverage   71.40%   71.40%           
=======================================
  Files          19       19           
  Lines         703      703           
=======================================
  Hits          502      502           
  Misses        201      201           

Impacted Files	Coverage Δ
lib/src/fields/form_builder_dropdown.dart	90.47% <ø> (ø)

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