labels with .PNG are not considered .png. Causes TypeError

[RoshanStacker]

Uploading photo from an Iphone (for example) has the filename IMG_6371.PNG for example.

labelbox/data/serialization/labelbox_v1/label.py only checks for lowercase file extensions.

This causes a TypeError:

/usr/local/lib/python3.7/dist-packages/labelbox/data/serialization/labelbox_v1/label.py in _infer_media_type(self)
    226                 #  We will eventually provide the media type in the export.
    227                 raise TypeError(
--> 228                     f"Can't infer data type from row data. row_data: {self.row_data[:200]}"
    229                 )
    230

[msokoloff1]

Will be fixed by: #752

[msokoloff1]

This was fixed in 3.29.0. Feel free to open if you are still having any issues.