feat: define a serializer child type different from its return type

[angeloashmore]

Note: This is a WIP! There is a type error in src/serialize.ts.

Types of changes

• Chore (a non-breaking change which is related to package maintenance)
• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

This PR allows a map or function Rich Text serializer to define its child type differently from its return type.

Using different child and return types is necessary when the serialization logic (i.e. serialize() or a custom implemenation using asTree()) cannot pass its children value using the return type. This happens in Svelte.

Checklist:

• My change requires an update to the official documentation.
• All TSDoc comments are up-to-date and new ones have been added where necessary.
• All new and existing tests are passing.

🐱

[github-actions]

size-limit report 📦

Path	Size
dist/index.js	959 B (0%)
dist/index.cjs	1.88 KB (0%)

[codecov-commenter]

Codecov Report

Merging #61 (3acbadd) into master (d1020ba) will not change coverage.
The diff coverage is 100.00%.

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@@            Coverage Diff            @@
##            master       #61   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            7         7           
  Lines          528       605   +77     
  Branches        46        46           
=========================================
+ Hits           528       605   +77     

Impacted Files	Coverage Δ
src/composeSerializers.ts	100.00% <100.00%> (ø)
src/index.ts	100.00% <100.00%> (ø)
src/serialize.ts	100.00% <100.00%> (ø)
src/types.ts	100.00% <100.00%> (ø)
src/wrapMapSerializer.ts	100.00% <100.00%> (ø)

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[lihbr]

LGTM