fix(register): always inline swc helpers

Author: Brooooooklyn

packages/jest/index.ts

@@ -1,7 +1,7 @@
 import { xxh64 } from '@node-rs/xxhash'
+import type { Output } from '@swc/core'
 import { Options, transformJest } from '@swc-node/core'
 import { readDefaultTsConfig, tsCompilerOptionsToSwcConfig } from '@swc-node/register/read-default-tsconfig'
-import type { Output } from '@swc/core'
 
 interface JestConfig26 {
   transform: [match: string, transformerPath: string, options: Options][]

packages/register/read-default-tsconfig.ts

@@ -132,5 +132,10 @@ export function tsCompilerOptionsToSwcConfig(options: ts.CompilerOptions, filena
         ((aliasPaths as string[]) ?? []).map((path) => resolve(options.baseUrl ?? './', path)),
       ]),
     ) as Options['paths'],
+    swc: {
+      jsc: {
+        externalHelpers: false,
+      },
+    },
   }
 }