Cannot finish web-tooling-benchmark test

# Cannot finish web-tooling-benchmark test

I'm trying to run [web-tooling-benchmark](https://github.com/v8/web-tooling-benchmark) on ChakraCore (version in master branch) but it seems that it just stuck at coffeescript test and cannot finish the entire test:

```bash
ch cli.js
```

Output (stuck at coffeescript test and not able to get the test result):
```log
Running Web Tooling Benchmark v0.5.3…
-------------------------------------
acorn: 3.75 runs/s
babel: 4.08 runs/s
babel-minify: 3.21 runs/s
babylon: 4.83 runs/s
buble: 4.59 runs/s
chai: 3.69 runs/s
(stuck here)
```

While using v8 with node 14:
```log
Running Web Tooling Benchmark v0.5.3…
-------------------------------------
acorn: 10.86 runs/s
babel: 8.31 runs/s
babel-minify: 9.93 runs/s
babylon: 7.41 runs/s
buble: 4.44 runs/s
chai: 10.38 runs/s
coffeescript: 5.96 runs/s
espree: 2.80 runs/s
esprima: 6.93 runs/s
jshint: 9.53 runs/s
lebab: 9.56 runs/s
postcss: 5.27 runs/s
prepack: 5.56 runs/s
prettier: 3.53 runs/s
source-map: 4.80 runs/s
terser: 13.26 runs/s
typescript: 7.67 runs/s
uglify-js: 4.07 runs/s
-------------------------------------
Geometric mean: 6.66 runs/s
```

Prebuilt test suite:
[dist.zip](https://github.com/chakra-core/ChakraCore/files/6215517/dist.zip)

Also I think this can be added into ChakraCore benchmark test #6431