Fix setting metadata for some Loom files

Loom files created by recent versions of LoomExperiment Bioconductor
package encode the Loom version in an binary array, which breaks
metadata setting in Galaxy.

lib/galaxy/datatypes/binary.py

@@ -16,6 +16,7 @@
 from typing import Optional
 
 import h5py
+import numpy as np
 import pysam
 import pysam.bcftools
 from bx.seq.twobit import TWOBIT_MAGIC_NUMBER, TWOBIT_MAGIC_NUMBER_SWAP
@@ -928,7 +929,12 @@ def set_meta(self, dataset, overwrite=True, **kwd):
                 dataset.metadata.description = loom_file.attrs.get('description')
                 dataset.metadata.url = loom_file.attrs.get('url')
                 dataset.metadata.doi = loom_file.attrs.get('doi')
-                dataset.metadata.loom_spec_version = loom_file.attrs.get('LOOM_SPEC_VERSION')
+                loom_spec_version = loom_file.attrs.get('LOOM_SPEC_VERSION')
+                if isinstance(loom_spec_version, np.ndarray):
+                    loom_spec_version = loom_spec_version[0]
+                    if isinstance(loom_spec_version, bytes):
+                        loom_spec_version = loom_spec_version.decode()
+                dataset.metadata.loom_spec_version = loom_spec_version
                 dataset.creation_date = loom_file.attrs.get('creation_date')
                 dataset.metadata.shape = tuple(loom_file['matrix'].shape)