Upgrade buildroot to 2023.05 (from 2021.08.2), kernel is upgraded to 6.3 (from 5.13.19).

package/python-orjson/Config.in

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+config BR2_PACKAGE_PYTHON_ORJSON
+	bool "python-orjson"
+	depends on BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS
+	select BR2_PACKAGE_PYTHON_CFFI # runtime
+	help
+	  orjson is a fast, correct JSON library for Python. It
+	  benchmarks as the fastest Python library for JSON and is more
+	  correct than the standard json library or other third-party
+	  libraries. It serializes dataclass, datetime, numpy, and UUID
+	  instances natively.
+
+	  https://github.com/ijl/orjson

package/python-orjson/python-orjson.hash

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+# Locally calculated after vendoring
+sha256  b932fc1e43598fb91022b1dc651afeaef650793a2a590ca4fbeef57a3808abf5  orjson-3.8.4.tar.gz
+# Locally computed sha256 checksums
+sha256  a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2  LICENSE-APACHE
+sha256  23f18e03dc49df91622fe2a76176497404e46ced8a715d9d2b67a7446571cca3  LICENSE-MIT

package/python-orjson/python-orjson.mk

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+################################################################################
+#
+# python-orjson
+#
+################################################################################
+
+PYTHON_ORJSON_VERSION = 3.8.4
+PYTHON_ORJSON_SOURCE = orjson-$(PYTHON_ORJSON_VERSION).tar.gz
+PYTHON_ORJSON_SITE = https://files.pythonhosted.org/packages/8f/2d/ae31eddf7e097eec5e25c7da954ef6e944f4dbf79153676f94cea3dc5116
+PYTHON_ORJSON_SETUP_TYPE = pep517
+PYTHON_ORJSON_LICENSE = Apache-2.0 or MIT
+PYTHON_ORJSON_LICENSE_FILES = LICENSE-APACHE LICENSE-MIT
+PYTHON_ORJSON_DEPENDENCIES = host-python-cffi host-python-maturin
+PYTHON_ORJSON_ENV = \
+	$(PKG_CARGO_ENV) \
+	PYO3_CROSS_LIB_DIR="$(STAGING_DIR)/usr/lib/python$(PYTHON3_VERSION_MAJOR)"
+# We need to vendor the Cargo crates at download time
+PYTHON_ORJSON_DOWNLOAD_POST_PROCESS = cargo
+PYTHON_ORJSON_DOWNLOAD_DEPENDENCIES = host-rustc
+PYTHON_ORJSON_DL_ENV = $(PKG_CARGO_ENV)
+
+$(eval $(python-package))