Updated to task api 2.0.0 and fixed tests

[njkevlani]

Launch Tests was broken. Fixed that.

Now Tests can be run by:

1. Clone repo
2. cd path/to/code-settings-sync && npm install && code .
3. Launch Extension by pressing F5
4. From Debugger menu, start Launch Tests

Fixes: #841

How Has This Been Tested?

By running the tests using above steps :P

Checklist:

• I have read the contribution guidelines.
• My change requires a change to the documentation and GitHub Wiki.
• I have updated the documentation and Wiki accordingly.

[njkevlani]

Sorry about the conflicts,

The reason was
when I made a PR with v3.2.8 the main active branch was v3.2.9 and
when I made a PR with v3.2.9 the main active branch was v3.3.0

[njkevlani]

@shanalikhan

Have update Contribution Page accordingly. LMK if any changes required. Do we need to update CONTRIBUTING.md as well?

[shanalikhan]

Yes send a PR for CONTRIBUTING.md as well.
you can improve the both contributing page where you think it can be improved ( specially those parts which are hard for first time user to understand )

[njkevlani]

#881 is open :)