chore: fuzzing manual test

[Eomm]

Closes #57

This PR is an experiment and it shows how we could run some fuzzing test against some core module.

Fuzzing tests a program by feeding it large amounts of unexpected, random, or malformed input to expose crashes, vulnerabilities, and logic errors.

Example of the input we process here:

Example of the output:

Given these simple tests I can say:

• there are not memory leak in this module, or the rss memory would grow (tested with an old version of momentjs)
• the module handle the input in max 100ms (see the --timeout arg): so no open to DoS nor Unexpected Errors

If we want merge this PR, the npm scripts must be ON, otherwise the jazzer tool won't work.

cc @Fdawgs

[mcollina]

lgtm