Implement miniserde-based deserialization #920

Job	Run time
format	16s
Check Examples	1m 12s
Docs	46s
clippy (async-std-surf)	2m 2s
test (async-std-surf)	7m 57s
clippy (tokio-hyper)	1m 43s
clippy (tokio-hyper-rustls)	1m 43s
test (tokio-hyper)	7m 45s
verify-codegen-crate	2m 0s
test (tokio-hyper-rustls)	7m 55s
test (tokio-hyper-rustls-webpki)	7m 46s
test (blocking)	8m 21s
test (blocking-rustls)	8m 18s
clippy (tokio-hyper-rustls-webpki)	1m 40s
clippy (blocking)	1m 44s
test (blocking-rustls-webpki)	8m 23s
clippy (blocking-rustls)	1m 44s
clippy (blocking-rustls-webpki)	1m 49s
	1h 13m 4s

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