feat: add support for nested fixed size struct in ssz encode and decode #69

	name: Zig Test and Benchmark

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]

	env:
	ZIG_VERSION: 0.14.0-dev.2079+ba2d00663

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3

	- name: Cache Zig
	uses: actions/cache@v3
	with:
	path: ~/zig
	key: ${{ runner.os }}-zig-${{ env.ZIG_VERSION }}

	- name: Install Zig
	if: steps.cache.outputs.cache-hit != 'true'
	run: \|
	wget https://ziglang.org/builds/zig-linux-x86_64-${{ env.ZIG_VERSION }}.tar.xz
	tar -xf zig-linux-x86_64-${{ env.ZIG_VERSION }}.tar.xz
	mv zig-linux-x86_64-${{ env.ZIG_VERSION }} ~/zig

	- name: Add Zig to PATH
	run: echo "${HOME}/zig" >> $GITHUB_PATH

	- name: Cache Zig build artifacts
	uses: actions/cache@v3
	with:
	path: \|
	zig-cache
	~/.cache/zig
	key: ${{ runner.os }}-zig-build-${{ hashFiles('*/.zig') }}
	restore-keys: \|
	${{ runner.os }}-zig-build-
	- name: Formatting
	run: zig fmt --check --color on .

	- name: Installing dependencies
	run: \|
	make deps

	- name: Installing spec test
	run: \|
	make deps_test

	- name: Unit testing
	run: zig build test --summary all

	- name: Building
	run: zig build -Doptimize=ReleaseFast

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