feat: botframework http adapter

[joshgummersall]

Fixes #3420

Also includes:

• standard lib delay function
• consolidated sinon versions
• fix API calls to accept Partial<Activity> instead of obfuscated as Activity invocation pattern

[coveralls]

Pull Request Test Coverage Report for Build 677430326

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 35 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.006%) to 85.084%

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Files with Coverage Reduction	New Missed Lines	%
libraries/botbuilder-lg/src/templateExtensions.ts	1	84.48%
libraries/botbuilder/src/botFrameworkAdapter.ts	34	88.82%

Totals
Change from base Build 677427736:	-0.006%
Covered Lines:	18790
Relevant Lines:	21037

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💛 - Coveralls

[stevengum]

The comments I'd like to see addressed are the BotFrameworkHttpAdapter typo and the ActivityTypes.Delay.