Add connect timeout option #35

Job	Run time
test-all (stable, ubuntu-latest)	45s
build-ink-cross (stable, aarch64-unknown-linux-gnu)	4m 0s
build-versions (stable, macos-latest)	20s
build-ink-cross (stable, aarch64-unknown-linux-musl)	24s
build-versions (stable, ubuntu-latest)	14s
build-ink-cross (stable, armv7-unknown-linux-gnueabihf)	22s
build-versions (stable, windows-latest)	1m 0s
build-ink-cross (stable, armv7-unknown-linux-musleabihf)	3m 48s
build-versions (beta, macos-latest)	18s
build-ink-cross (stable, powerpc64le-unknown-linux-gnu)	27s
build-versions (beta, ubuntu-latest)	18s
build-ink-cross (stable, powerpc64-unknown-linux-gnu)	19s
build-versions (beta, windows-latest)	25s
build-ink-cross (stable, riscv64gc-unknown-linux-gnu)	21s
build-versions (nightly, macos-latest)	17s
build-ink-cross (stable, s390x-unknown-linux-gnu)	28s
build-versions (nightly, ubuntu-latest)	13s
build-ink-cross (stable, x86_64-unknown-linux-gnu)	20s
build-versions (nightly, windows-latest)	35s
build-ink-cross (stable, x86_64-unknown-linux-musl)	26s
build-versions (1.65, macos-latest)	24s
build-ink-cross (stable, x86_64-unknown-freebsd)	27s
build-versions (1.65, ubuntu-latest)	13s
build-ink-cross (stable, x86_64-unknown-netbsd)	22s
build-versions (1.65, windows-latest)	36s
	17m 22s

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