Libmetal release V2022.04 - v1.2.0

This release:

• Adds support of the RISCV and Xtensa for Zephyr sytem
• Implements the meta_sleep for Zephyr
• Fixes various bugs, typos and improve CI tests.

What's Changed

• CI: Use 'main' branch instead of 'master'. by @edmooring in #191
• lib: fix compilation error with gcc++ by @arnopo in #190
• Fix various typos by @luzpaz in #189
• zephyr: Enable support for RISCV by @carlocaione in #194
• zephyr: Enable support for Xtensa by @dbaluta in #197
• CI: add Zephyr build test for RISCV architecture by @arnopo in #195
• freertos: io: fix IAR compile error due to 'void *' variable by @arnopo in #198
• lib: system: zephyr: implement __metal_sleep_usec by @emfend in #200
• CI: enable codespell check by @arnopo in #202
• Doc: fix doc generation warnings in system sleep.h files by @arnopo in #203
• checkpatch: Increase the default limit to 100 characters by @arnopo in #205
• release: libmetal 2022.04.0 by @arnopo in #209

New Contributors

• @luzpaz made their first contribution in #189
• @dbaluta made their first contribution in #197
• @emfend made their first contribution in #200

Full Changelog: v2021.10.0...v2022.04.0