Improve test result match fallback in the imperfect world

[connectdotz]

This PR aims to work around v4 test result match-related issues due to various external factors. Mainly by adding "match-by-name" and "match-by-location" as the fallback mechanism when context-match failed for whatever reason.

This PR has a dependency on jest-community/jest-editor-support#71

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fix #719
fix #715
fix #697

[coveralls]

Pull Request Test Coverage Report for Build 968

• 202 of 202 (100.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.1%) to 93.928%

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Totals
Change from base Build 967:	-0.1%
Covered Lines:	2037
Relevant Lines:	2124

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💛 - Coveralls

[connectdotz]

@stephtr sorry to ping you early as this doesn't compile until the next jest-editor-support release, just want to give you a head-up hoping you would have time to look at the code sooner.

I have made some structural change in the context match code, would love to have a 2nd pair of eyes to make sure. Thanks.

[stephtr]

I'm really sorry that even though I started, I didn't manage to finish the review in a timely manner. Unfortunately, my availability for working on reviews is not really predictable, but realistically I won't manage to work on larger structural changes in the near-time.

Thank you anyway for your great work! The few times I'm currently using this extension, it is always a pleasure to notice the improvements being made!