Function connectTo

connectTo(
    graph: Readonly,
    a: string,
    b: string,
    weight?: number,
): { edge: Readonly; graph: Readonly }
Connects A with B, returning the changed graph and created edge. If the connection already exists, the original graph & edge is returned.
Parameters
- graph: Readonly
- a: string
- b: string
- Optionalweight: number
Returns { edge: Readonly; graph: Readonly }