Typescript types file for vue-slimgrid

[hugobyrne]

Hey firstly thanks for all your work so far on this. We are evaluating a few different vue grids for our project and slickgrid is one of them. It would be great if you could include a typescript type declaration file (*.d.ts) so that vue-slimgrid works out of the box with typescript. More info here - What about modules that don’t have any declaration files? https://medium.com/@chris_72272/migrating-to-typescript-write-a-declaration-file-for-a-third-party-npm-module-b1f75808ed2