[chore] v1.4.7 Upgrade (Part 2)

[patrick-ogrady]

Related: #231

This PR adds support for new endpoints in the fetcher and asserter package.

Changes

• add support for new methods in fetcher
• add support for new methods in asserter
• add tests for new fetcher methods
• add test for new server methods in asserter
• add tests for new response methods in asserter

[coveralls]

Pull Request Test Coverage Report for Build 11119

• 253 of 337 (75.07%) changed or added relevant lines in 9 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.05%) to 78.872%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
asserter/search.go	13	15	86.67%
asserter/account.go	14	22	63.64%
fetcher/account.go	52	70	74.29%
fetcher/events.go	47	65	72.31%
fetcher/search.go	39	57	68.42%
asserter/server.go	57	77	74.03%

Totals
Change from base Build 11016:	-0.05%
Covered Lines:	7649
Relevant Lines:	9698

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💛 - Coveralls

[yfl92]

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