Husky pre-commit hooks for tests

[OmkarPh]

Description

Having a pre-commit hook should be beneficial to avoid committing failing-test code

Similar to pre-commit in python,
We have husky for javascript projects - https://www.npmjs.com/package/husky

Configuration:
With the configuration in place, the pre-commit hooks are setup automatically on npm install and run on attempting a commit
No special action is required by the developers

For example:

[OmkarPh]

CC @pombredanne @AyanSinhaMahapatra

[pombredanne]

@OmkarPh if I am not mistaken pre-commit hooks need to be enabled locally, right?

[OmkarPh]

When we do npm install this prepare script is automatically run; It sets up required git config for the repository
https://github.com/nexB/scancode-workbench/blob/8688efd98cfb872daaf08adfb102d2dc806e0edb/package.json#L30

So, no special commands needed by contributors :)