A fix was submitted to our dependency, tests added to validate the
problematic scenario.
We also added some fuzz tests to check for additional issues, none were
found.
As reported in
https://github.com/modelcontextprotocol/go-sdk/issues/805, case
insensitive unmarshaling can pose security issues. This change adjusts
all non-test and non-example unmarshaling to use a case sensitive mode.
This introduces a new external dependency
`github.com/segmentio/encoding`.
