Add `no-stack-protector` feature flag #158

Job	Run time
rustfmt	10s
macOS	26s
Windows	1m 13s
Linux (default features)	25s
Linux (all features)	34s
Linux (minimal)	24s
Linux (!std + decoder)	15s
Linux (encoder)	34s
Linux (!std + full-decoder + encoder + formatter)	17s
	4m 18s

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