S3Path Relative_to returns itself

[AlexBondViv]

In 0.1.4 S3Path.relative_to would return a path relative to another path

i.e: UPath("s3://bucket/delta/db/table").relative_to(UPath("s3://bucket/delta/")) == UPath("s3://bucket/db/table")

However in 0.2.0 it seems that relative_to() simply returns itself as UPath("s3://bucket/delta/db/table").relative_to(UPath("s3://bucket/delta/")) returns UPath("s3://bucket/delta/db/table").

[AlexBondViv]

I will note that this is still not a relative path as the bucket probably shouldn't be returned either, this is in itself another issue but is already reported in #170

[mmlakera]

Same issue here.