Bump version #312

Job	Run time
examples (beta, passing-parameters)	57s
examples (beta, run-app-with-args)	51s
cross (beta, aarch64-unknown-linux-gnu)	1m 46s
examples (beta, return-string-from-managed)	48s
examples (beta, run-app)	54s
examples (beta, call-managed-function)	55s
cross (beta, armv7-unknown-linux-gnueabihf)	2m 9s
test (beta, x86_64-pc-windows-msvc, 9.0)	4m 25s
test (beta, x86_64-unknown-linux-gnu, 8.0)	2m 2s
test (beta, i686-pc-windows-msvc, 8.0)	4m 13s
test (beta, x86_64-pc-windows-msvc, 10.0)	4m 19s
test (beta, aarch64-apple-darwin, 8.0)	2m 10s
test (beta, x86_64-unknown-linux-gnu, 9.0)	2m 5s
test (beta, i686-pc-windows-msvc, 10.0)	5m 4s
test (beta, x86_64-unknown-linux-gnu, 10.0)	1m 54s
test (beta, i686-pc-windows-msvc, 9.0)	4m 3s
documentation (windows)	3m 35s
clippy (windows)	1m 15s
test (beta, aarch64-apple-darwin, 10.0)	2m 48s
documentation (ubuntu)	1m 31s
test (beta, x86_64-pc-windows-msvc, 8.0)	5m 7s
test (beta, aarch64-apple-darwin, 9.0)	2m 32s
fmt (ubuntu)	12s
clippy (ubuntu)	34s
fmt (windows)	29s
	56m 38s

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