chore(deps): bump capnp from 0.26.0 to 0.27.0

Bumps [capnp](https://github.com/capnproto/capnproto-rust) from 0.26.0 to 0.27.0.
- [Commits](capnproto/capnproto-rust@capnp-v0.26.0...capnp-v0.27.0)

---
updated-dependencies:
- dependency-name: capnp
  dependency-version: 0.27.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -11,7 +11,7 @@ repository  = "https://github.com/hyperpolymath/echidna"
 build       = "build.rs"
 
 [dependencies]
-capnp = "0.26"
+capnp = "0.27"
 
 [build-dependencies]
 capnpc = "0.26"