docs: update version to 3.0.2 #95

Job	Run time
Check (x86_64-unknown-illumos)	16s
Lint	14s
Test (x86_64-unknown-freebsd)	42s
Test (x86_64-unknown-openbsd)	1m 2s
Test (i686-unknown-linux-gnu)	18s
Test (i686-unknown-linux-musl)	15s
Test (x86_64-unknown-netbsd)	1m 1s
Test (x86_64-unknown-linux-gnu)	18s
Test (x86_64-unknown-linux-musl)	16s
Test (armv7-unknown-linux-gnueabihf)	1m 11s
Test (aarch64-linux-android)	2m 10s
Test (mips-unknown-linux-gnu)	2m 7s
Test (i686-pc-windows-gnu)	45s
Test (i686-pc-windows-msvc)	42s
Test (x86_64-pc-windows-gnu)	43s
Test (x86_64-pc-windows-msvc)	44s
Test (x86_64-apple-darwin)	26s
	13m 10s

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