add env markers for aarch64

Author: skvark

pyproject.toml

@@ -2,7 +2,8 @@
 requires = [
   "setuptools", "wheel", "scikit-build", "cmake", "pip",
   "numpy==1.13.3; python_version=='3.6'",
+  "numpy==1.19.0; python_version>='3.6' and sys_platform == 'linux' and platform_machine == 'aarch64'",
   "numpy==1.14.5; python_version=='3.7'",
   "numpy==1.17.3; python_version=='3.8'",
   "numpy==1.19.3; python_version>='3.9'"
-]
+]