chore(deps): update dependency @swc/core to v1.7.21

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@swc/core (source)	1.7.18 -> 1.7.21

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Release Notes

swc-project/swc (@​swc/core)

v1.7.21

Compare Source

Bug Fixes

• (es/typescript) Preserve more comments (#​9509) (3e253ec)

v1.7.19

Compare Source

Bug Fixes

• (es/minifier) Track if a var is used with in (#​9508) (7d6269e)

Features

• (es/minifier) Support mangle cache (#​9489) (af922d8)

• (plugin/runner) Improve error message (#​9502) (da52930)

Miscellaneous Tasks

• (es/codegen) Bump minimum required swc_allocator version to 0.1.8 (#​9492) (5258763)

Refactor

• (es/utils) Unify prepend_stmts (#​9493) (faec8c1)

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