Bump itkwidgets to v1.0a32

This includes improvements to window/level interactivity as well as a bug fix
so that windowing values are not lost with label images.

Author: bnmajor

notebooks/IDC_segmentation_primer.ipynb

@@ -413,7 +413,7 @@
         "!pip install pydicom\n",
         "# For later visualization\n",
         "!pip install \"itk-io>=5.3.0\"\n",
-        "!pip install \"itkwidgets[all]>=1.0a27\"\n",
+        "!pip install \"itkwidgets[all]>=1.0a32\"\n",
         "!pip install --upgrade rt-utils\n",
         "!pip install pydicom-seg"
       ]

notebooks/getting_started/part3_exploring_cohorts.ipynb

@@ -787,7 +787,7 @@
       "outputs": [],
       "source": [
         "# Install the packages required for sorting and loading the data as well as visualization\n",
-        "!pip install -q pydicom-seg \"itk-io>=5.3.0\" \"itkwidgets[all]>=1.0a27\""
+        "!pip install -q pydicom-seg \"itk-io>=5.3.0\" \"itkwidgets[all]>=1.0a32\""
       ]
     },
     {