Fix docs build after upgrading conda environment

[wkerzendorf]

@epassaro

[codecov]

Codecov Report

Merging #1969 (36b86ff) into master (b54dc86) will not change coverage.
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@@           Coverage Diff           @@
##           master    #1969   +/-   ##
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  Coverage   59.85%   59.85%           
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  Files          70       70           
  Lines        8080     8080           
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  Hits         4836     4836           
  Misses       3244     3244           

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[epassaro]

@wkerzendorf these two changes are enough to build docs locally:

diff --git a/docs/conf.py b/docs/conf.py
index 3e0a96be7..f8f33dd46 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -28,6 +28,7 @@
 import os
 import sys
 import datetime
+import tardis
 from importlib import import_module

 try:
diff --git a/docs/physics/spectrum/basic.ipynb b/docs/physics/spectrum/basic.ipynb
index 86f5e4bac..0a51ea926 100644
--- a/docs/physics/spectrum/basic.ipynb
+++ b/docs/physics/spectrum/basic.ipynb
@@ -358,7 +358,7 @@
    "source": [
     "emitted_luminosity_hist = u.Quantity(np.histogram(emitted_nus,\n",
     "                                                  weights=emitted_luminosities,\n",
-    "                                                  bins=spectrum_frequency.value,\n",
+    "                                                  bins=spectrum_frequency,\n",
     "                                                 )[0], \"erg / s\",)\n",
     "emitted_luminosity_hist"
    ]

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[epassaro]

Seems the problem regarding HDF does not apply locally (at least on my machine) but in the pipelines.

[epassaro]

Pinning hdf5=1.10 solves the problem in the pipelines. I couldn't reproduce the problem in my machine.

This PR is ready to merge.