Iterating over column raises `IndexOutOfBoundsError`

[lars-reimann]

Describe the bug

Running code like this

for value in column:
    print(value)

raises an IndexOutOfBoundsError because index >= self._data.size.

If one instead writes

for value in column._data:
    print(value)

everything works as expected. But we don't want users to access the internal _data, so this is not a feasible workaround.

Additional context (optional)

Rows are probably affected, too.

[lars-reimann]

🎉 This issue has been resolved in version 0.3.0 🎉

The release is available on:

• v0.3.0
• GitHub release

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