Fixing NPM Vulnerabilities

[smusali]

Finally, could have fixed it:

• removed lodash and replaced with built-in functionalities;
• removed always-tail since no need for that;
• updated grunt version from 0.4.5 to 1.0.3;
• updated grunt-mocha-cli version from 2.0.0 to 4.0.0;
• since grunt-mocha-cli is using mocha@4.0.0, I had to modify the test suites to support mocha@4.0.0 - Mocha had new and core changes in v3.0.0 and newer versions listed here and here - grunt-mocha-cli@2.0.0 is using mocha@2.0.0 and having high and critical vulnerabilities;
• now, npm audit fix (after npm install and having package-lock.json) says there is no vulnerability at all.

Tested on Node v6.10.2 and NPM v6.4.1.