refactor: inline Signal.prototype.subscribe implementation

jviide commented 3 months ago

This pull request is a continuation for #523, where the Signal.prototype.subscribe method was implemented using the untracked() function, saving some bytes.

Inlining the untracked() call saves bytes for most output formats and solves the tree-shaking downside mentioned in #523.

Before:
       1481 B: signals-core.js.gz
       1350 B: signals-core.js.br
       1494 B: signals-core.mjs.gz
       1363 B: signals-core.mjs.br
       1488 B: signals-core.module.js.gz
       1352 B: signals-core.module.js.br
       1557 B: signals-core.min.js.gz
       1414 B: signals-core.min.js.br

After:
       1474 B: signals-core.js.gz
       1333 B: signals-core.js.br
       1497 B: signals-core.mjs.gz
       1364 B: signals-core.mjs.br
       1486 B: signals-core.module.js.gz
       1353 B: signals-core.module.js.br
       1550 B: signals-core.min.js.gz
       1412 B: signals-core.min.js.br

A new test case is included for checking that the subscription callback will run when the signal's original value changes after the subscription has been created.

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Latest commit: 9444f7955a44950781a4d0853680dba29d450989

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preactjs / signals