Add boost-histogram

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

packages/boost-histogram/meta.yaml

@@ -0,0 +1,20 @@
+package:
+  name: boost-histogram
+  version: 1.3.0
+source:
+  url: https://files.pythonhosted.org/packages/0a/9a/1ebde600886eee433a99434e0ddb462630a0b25ab1f58efb91ffc385a0ff/boost_histogram-1.3.0.tar.gz
+  sha256: 62240dae889cbf05f8b4f2203f0b7d6c7a2e029502723a377fc33226e425ce50
+requirements:
+  run:
+    - numpy
+build:
+  script: |
+    pip install setuptools_scm[toml]
+test:
+  imports:
+    - boost-histogram
+about:
+  home: https://github.com/scikit-hep/boost-histogram
+  PyPI: https://pypi.org/project/boost-histogram
+  summary: The Boost::Histogram Python wrapper.
+  license: BSD-3-Clause

packages/boost-histogram/test_boost_histogram.py

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+from pyodide_build.testing import run_in_pyodide
+
+
+@run_in_pyodide(packages=["boost-histogram"])
+def test_boost_histogram():
+    import boost_histogram as bh
+    import unittest
+
+    class TestBasicHistogram(unittest.TestCase):
+
+        def test_1d_histogram(self):
+            h = bh.Histogram(bh.axis.Integer(0, 10))
+            h.fill([1,1,1,14])
+            self.assertEquals(h[bh.underflow], 0)
+            self.assertEquals(h[bh.loc(0)], 0)
+            self.assertEquals(h[bh.loc(1)], 3)
+            self.assertEquals(h[bh.overflow], 1)
+
+            self.assertEquals(h.sum(), 3)
+            self.assertEquals(h.sum(flow=True), 4)
+            self.assertEquals(h[sum], 4)
+
+        def test_2d_histogram(self):
+            h = bh.Histogram(bh.axis.Regular(10,0,10), bh.axes.Boolean())
+            self.assertEquals(len(h.axes[0]), 10)
+            self.assertEquals(len(h.axes[0]), 2)
+
+            h.fill([.5, .5, 3.5], [True, False, True])
+            self.assertEquals(h[sum, bh.loc(True)], 2)
+            self.assertEquals(h[sum, bh.loc(False)], 1)
+            self.assertEquals(h[0, sum], 2)
+            self.assertEquals(h[0, bh.loc(True)], 1)
+
+        def test_cat_histogram(self):
+            h = bh.Histogram(bh.axis.StrCategory(growth=True))
+            h.fill("fear leads to anger anger leads to hate hate leads to suffering".split())
+
+            self.assertEquals(h[bh.loc("fear")], 1)
+            self.assertEquals(h[bh.loc("anger")], 2)
+            self.assertEquals(h[bh.loc("hate")], 2)
+            self.assertEquals(h[bh.loc("to")], 3)
+