`Key` as used in `deleteRows` should allow for any Spanner scalars

[jvliwanag]

Currently, Key as used in deleteRows is limited to string. However, as they are eventually encoded as a KeySet, they can actually contain any spanner scalars. See java counterpart.

Running deleteRows with non-string keys (ex. Int) actually works just fine though doesn't currently type check.

[alkatrivedi]

Hi @jvliwanag, thank you for reporting this issue.

We have merged the fix, and it will be included in the upcoming release. I will update this thread once the release is published.

[alkatrivedi]

Hi @jvliwanag, the fix is now available in the latest version. Please upgrade the library to apply the changes. Thanks!

cc: @surbhigarg92