Fix wincode package issues

[kaze-cow]

We tried to fix the wincode dependency issues by locking solana-rpc-client to a lower version, but unfortunately it still has issues when publishing packages such as the test-cli, as the internal package dependencies will fail to compile. This requires use of --frozen on cargo install.

Originally posted by @fedgiac in #105 (review)

[fedgiac]

Most notably, the published crate doesn't build without --locked so we're shipping a broken package.
Rather than catching the right set of patch version pins, which can change from one day to another, we keep it broken and wait a while for the ecosystem to stabilize.

Maybe it makes sense to test in CI that the package builds before publishing, but I'm not sure this problem would be visible the day we publish the new crate.