support the new jestCommandLine setting

[connectdotz]

This PR mainly to kick start the jestCommandLine transition in vscode-jest per jest-community/jest-editor-support#44 and pave the way for setup wizard.

To summarize:

• adding the new setting "jest.jestCommandLine" that should eventually replace "jest.pathToJest" and "jest.pathToConfig".
• marking "jest.pathToJest" and "jest.pathToConfig" to be deprecated
• modify JestExt and extensionManager of consider jestCommandLine over the legacy settings so it is completely backward compatible.

Note:

• unlike pathToJest, there is no "guessing" logic or default value for jestCommandLine.
• I did not change the README yet, plan to update it in the wizard PR later.

[coveralls]

Pull Request Test Coverage Report for Build 868

• 8 of 8 (100.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 89.418%

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Totals
Change from base Build 863:	0.2%
Covered Lines:	1085
Relevant Lines:	1196

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💛 - Coveralls

[connectdotz]

@seanpoulter and @stephtr,

looks like you guys are busy, if you guys have other reviewer suggestion, please let me know, otherwise I plan to merge it to alpha so we can have more people playing with it.

[stephtr]

Sorry for my unresponsiveness. I'll try to do it today or tomorrow evening.

[stephtr]

At some point one should also update the GitHub issue template to reflect the change.
Besides that: Looks good to me. Also checked jest-editor-support to ensure that there won't be any surprises, for example on Windows 😉

[seanpoulter]

My apologies @connectdotz, I no longer have the free time or the opportunity to use the extension. Let me know if there's anything else I should do to bow out for now.

[connectdotz]

@seanpoulter I know life is unpredictable and I thank you on behave of the whole community for the time and effort you have put in for this package. I hope from time to time when you have a bit of free time that you can still chime in with your thoughts...

@stephtr so glad to see you back! Hope you will have a bit more time in 2021 as we are really trying to wrap up v4. I am working on 2 PRs about the parameterized tests and setup wizard, would love to have you take a look and test out on the windows platform...

We should probably expand our reviewer circle so in case we are busy this package can still move forward... I will try to get more involved, feel free to suggest reviewers next time if you can't do it yourself...

[stephtr]

so glad to see you back! Hope you will have a bit more time in 2021 as we are really trying to wrap up v4. I am working on 2 PRs about the parameterized tests and setup wizard, would love to have you take a look and test out on the windows platform...

Unfortunately no, apart from work, I have hardly any time available. I'm nevertheless trying to squeeze in some time for this project, sometimes more and sometimes less successful.