Upgrade Extension Package to AsyncPackage

[chrish619]

Fixes #204

• Allows further updates / versions to be accepted by Extensions Marketplace
• Allows running in Visual Studio 2019, without legacy/deprecated API issues

Breaking changes

• C++ Build tools now target v140 (Visual Studio 2015)
• Removes any support for Visual Studio versions pre 2015

Other changes

• Move from VSSDK Helper packages to source packages - This allows direct targeting of API & reduces additional "noise" when including the current versions, e.g. Helper packages *.11 requires *.10, requires *.9 etc

[CLAassistant]

All committers have signed the CLA.

[MABrunner]

This looks great!! Can someone review?

[malcolmarobertson]

I can't comment on the code but I cloned and built the project using VS 2019 v16.2.3
But, built the project with upgrading WindowsTargetPlatformVersion to 10 and PlatformToolset to v142
The VSIX works perfectly on VS 2019 with Xunit 4.2.1

[axodox]

I think I will need to create a new AxoCover entry in the marketplace, since this would break the old VS support, and I would like to avoid that.

[jgasiorowski]

@chrish619 Thanks for that work - works like a charm. I pulled it to my repository to be used with other features and just build my local vsix package and using it on daily basis. Thanks

[m-ringler]

I'd love to see this on VS marketplace.

[jgasiorowski]

Author of that plugin does not really respond on any comments. I really don't know what needs to be done to put that on VS Marketplace - I don't even know if I am allowed to put that under new name/account. Noone really want to take Axodox's glory :)

[axodox]

Since this plugin version is no longer compatible with old VS I think it should be uploaded as a separate entry in VS marketplace (e.g. AxoCover Next). Unfortunately I am having some health issues since last year, and it is hard for me to even do what is needed at my workplace, much less for free time.

At this point the best way would be to create an organization on github, and let the community manage AxoCover in the future.

[jgasiorowski]

@axodox , sorry to hear that. I really hope you will get better 😟. I don't have much time and all that things 'organisation on github' is new to me. But if I will find enough time then I will be happy to try that. Thanks for permission