feat(jest): support jest 27 transformerConfig #396
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fixes: @swc-node/jest ignores the config provided with the transformer when using jest@27
jestjs/jest#10926 made a breaking change for upcoming jest@27 that renders the current config retrieval non functional.
jestConfig.transformwill be undefined andjestConfig.transformerConfigwill hold the configuration instead.See also new
TransformerOptionstype https://github.com/facebook/jest/blob/a28f14a9dbd4621eb2e848034cdfdfec28ff9866/packages/jest-transform/src/types.ts#L63