Remove usage of lodash.isObject.

[abdavid]

📝 Description

Remove usage of lodash.isObject.
Introduce utility function isObject

🎯 Relevant issues

Related #433
Fixes #739

💎 Type of change

• Chore (non-breaking change. Quality of Life changes)

🚦 How Has This Been Tested?

Added test to changes.

🏁 Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have commented my code, particularly in hard-to-understand areas

[coveralls]

Pull Request Test Coverage Report for Build 2441

• 50 of 50 (100.0%) changed or added relevant lines in 20 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 91.957%

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Totals
Change from base Build 2440:	0.01%
Covered Lines:	7261
Relevant Lines:	7611

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💛 - Coveralls

[icebob]

Great job, thank you!

[Wallacy]

@abdavid I did a little changed on you method because did not handle object-wrapped strings;

Thinking about your solution to use Object.prototype.toString ; If thered no precedence on Moleculer to check array and objects together i think may be a worthwhile;