fix build on older js · domoritz/arrow@a03a227

Test: js/src/util/buffer.ts#L134

Move generator function 'wrap' to the outer scope

Test: js/src/util/buffer.ts#L172

Move async generator function 'wrap' to the outer scope

Test: js/test/generate-test-data.ts#L325

Unnecessarily cloning an array

Test: js/test/generate-test-data.ts#L347

Unnecessarily cloning an array

Test: js/test/generate-test-data.ts#L368

Unnecessarily cloning an array

Test: js/test/generate-test-data.ts#L378

Unnecessarily cloning an array

Test: js/test/generate-test-data.ts#L486

Unnecessarily cloning an array

Test: js/test/generate-test-data.ts#L624

Unnecessarily cloning an array

Build: js/src/util/buffer.ts#L134

Move generator function 'wrap' to the outer scope

Build: js/src/util/buffer.ts#L172

Move async generator function 'wrap' to the outer scope

Build: js/test/generate-test-data.ts#L325

Unnecessarily cloning an array

Build: js/test/generate-test-data.ts#L347

Unnecessarily cloning an array

Build: js/test/generate-test-data.ts#L368

Unnecessarily cloning an array

Build: js/test/generate-test-data.ts#L378

Unnecessarily cloning an array

Build: js/test/generate-test-data.ts#L486

Unnecessarily cloning an array

Build: js/test/generate-test-data.ts#L624

Unnecessarily cloning an array

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