MAINT: Push qgrid to a new npm home

[gerrymanoim]

Closes #285.

[ankostis]

Isn't it strange that this PR changes the npm package name from qgrid --> qgrid2?

Also pins pandas to <=1.

Also this is gone, i guess not needed if #290 gets merged, correct?

[gerrymanoim]

Isn't it strange that this PR changes the npm package name from qgrid --> qgrid2?

Yep - unfortunately we've lost access to the account hosting the original qgrid npm package an had to move to a new name.

Also this is gone, i guess not needed if #290 gets merged, correct?

Thanks for catching that, I've updated my comment.