Add typings parameter to package.json
Add typings parameter to package.json

My TypeScript would not compile by just importing `'ng2-dragula'` without this typings parameter.
annraoi/Drag-And-Drop-by-Dragula,aggo/ng2-dragula,annraoi/Drag-And-Drop-by-Dragula,valor-software/ng2-dragula,valor-software/ng2-dragula,valor-software/ng2-dragula,readelobdill/ng2-dragula,aggo/ng2-dragula