Merge branch 'apple-arm64' into 'master'

pystencils/backends/arm_instruction_sets.py

pystencils/backends/simd_instruction_sets.py

pystencils/cpu/cpujit.py

pystencils/cpu/vectorization.py

pystencils/include/philox_rand.h

pystencils_tests/test_basic_usage_llvm.ipynb

pystencils_tests/test_conditional_vec.py

pystencils_tests/test_dot_printer.ipynb

pystencils_tests/test_field_coordinates.py

pystencils_tests/test_fvm.py

pystencils_tests/test_random.py

pystencils_tests/test_small_block_benchmark.ipynb

pystencils_tests/test_vectorization.py