Upgrade to pynwb>=2.0.0

[jthermiz]

Some NWB files created using pynwb>=2.0.0 are not readable by older version of pynwb like 1.3.2. I'm getting this error when trying to load a 2.0.0 NWB file using ecogvis:

Could not construct ScratchData object due to: ScratchData.__init__: incorrect type for 'data' (got 'str', expected 'ndarray, list, tuple, Dataset, HDMFDataset, AbstractDataChunkIterator, DataIO or Data') Aborted (core dumped)