fix(ecmascript/transforms): Fix dce

[kdy1]

Issues

• ReferenceError: __boolean is not defined denoland/deno#8952
• [bundle] DenoStdInternalError is not defined when compiling denoland/deno#8985
• deno bundler issue with using 'throws' denoland/deno#8988

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Tasks

swc_bunder:

• Fix keywords pass.

swc_ecma_codegen:

• Ensure that the code generator handles unicode characters properly. (Deno cannot handle non-BMP characters in variable names denoland/deno#8925)

swc_ecma_parser:

• Ensure that the parser handles unicode characters properly. (Deno cannot handle non-BMP characters in variable names denoland/deno#8925)

swc_ecma_transforms:

• Fix dce.

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I'll just use ast to perform dce. See #1310 for optimizer.