Upgrade to Go 1.16 and use Go Modules

[SaiedKazemi]

This change is 

[coveralls]

Pull Request Test Coverage Report for Build 105

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.2%) to 97.443%

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Files with Coverage Reduction	New Missed Lines	%
connectionlistener/connectionlistener.go	2	92.86%
<!--	Total:	2		-->

Totals
Change from base Build 94:	-0.2%
Covered Lines:	1067
Relevant Lines:	1095

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💛 - Coveralls