ethlint dependecies secuirty issues

[pmprete]

Description
There has been a few exploints found on the dependencies used by ethlint

Steps to reproduce
run npm audit on the ethlint project

You will see the following warnings:

• https://npmjs.com/advisories/146
• https://npmjs.com/advisories/157
• https://npmjs.com/advisories/577
• https://www.npmjs.com/advisories/1490
• https://www.npmjs.com/advisories/1179
• https://npmjs.com/advisories/1084
• https://npmjs.com/advisories/786

Expected behavior
Not to see any warnings

Linter version
version 1.2.5

Comments
This issues can be solved upgrading the version of the dependencies:

• chokidar
• lodash
• commander
• mocha
• nyc
• You should also update solparse version of mocha and yargs dependencies. This is done in this PR Dependencies security issues solparse#38

Proposed PR for Ethlint #283

Priority
Medium as we get a lot of alerts and complains from the security team.