Wrong type in EdgeCollection save method

[nitrog7]

arangojs/arangojs.d.ts

Line 381 in 776a148

save(data: string, fromId?: string, toId?: string): Promise<any>;

The line should read:
save(data: any, fromId?: string, toId?: string): Promise;

In TypeScript, it is requiring the data parameter to be a string instead of also allowing an object or properties.

[gurisko]

The maintainers are considering to drop typescript support altogether #391