rmcp's transport-streamable-http-client-reqwest is written against
reqwest 0.13.2+, a semver-incompatible major vs. the reqwest 0.12 the
rest of WA (llm/sync) depends on -- Cargo can't unify those, so
`reqwest::Client` from our own dependency isn't the same type rmcp's
`impl StreamableHttpClient for reqwest::Client` is written for. Adds
`reqwest013` (a Cargo package-rename of reqwest 0.13) purely so
tests/mcp_server_test.rs can construct the exact client type rmcp
expects, without touching reqwest 0.12 anywhere else in the crate.
iamdoubz
f5651c1133