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Bug fixing release.
- update webpack-cli [53](https://github.com/ome/omero-parade/pull/53)
- support string columns [55](https://github.com/ome/omero-parade/pull/55)
- support renamed _bulk_file_annotations method [57](https://github.com/ome/omero-parade/pull/57)
- proper close HDF5 tables [58](https://github.com/ome/omero-parade/pull/58)