Merge branch 'apple-arm64' into 'master'

correct importorskip in notebook tests

See merge request pycodegen/lbmpy!68

lbmpy_tests/phasefield/test_entropic_model.ipynb

 {
  "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import pytest\n",
+    "pytest.importorskip('scipy.ndimage')"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,

lbmpy_tests/phasefield/test_liquid_lens_angles.ipynb

 {
  "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import pytest\n",
+    "pytest.importorskip('skimage')"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,

lbmpy_tests/phasefield/test_neumann_evaluation_circle_fitting.ipynb

 {
  "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import pytest\n",
+    "pytest.importorskip('skimage')"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,

lbmpy_tests/phasefield/test_phasefieldstep_direct.ipynb

 {
  "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import pytest\n",
+    "pytest.importorskip('skimage')"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,