publish: probe crates.io for the version, not the crate (#109)

The crates job's skip probe and its final arbiter both asked
crates.io/api/v1/crates/<name> — a crate-level URL that answers 200
for any crate that has ever published. On the first version bump after
a release that means every member "is already on crates.io": the
v0.2.0 run skipped all 16 crates and reported success with nothing
uploaded. Both probes now ask crates/<name>/<version>, with the
version taken from cargo metadata rather than retyped, so a skip
means THIS version is up and the arbiter fails when it is not.

publish: probe crates.io for the version, not the crate (#109)

The crates job's skip probe and its final arbiter both asked
crates.io/api/v1/crates/<name> — a crate-level URL that answers 200
for any crate that has ever published. On the first version bump after
a release that means every member "is already on crates.io": the
v0.2.0 run skipped all 16 crates and reported success with nothing
uploaded. Both probes now ask crates/<name>/<version>, with the
version taken from cargo metadata rather than retyped, so a skip
means THIS version is up and the arbiter fails when it is not.

Shojiku v0.1.0 — the first release

shojiku Go SDK v0.1.0