fix(go.sum): update ResolveSpec dependency to v1.0.87

vendor/github.com/modelcontextprotocol/go-sdk/internal/json/json.go

@@ -0,0 +1,19 @@
+// Copyright 2025 The Go MCP SDK Authors. All rights reserved.
+// Use of this source code is governed by the license
+// that can be found in the LICENSE file.
+
+// Package json provides internal JSON utilities.
+
+package json
+
+import (
+	"bytes"
+
+	"github.com/segmentio/encoding/json"
+)
+
+func Unmarshal(data []byte, v any) error {
+	dec := json.NewDecoder(bytes.NewReader(data))
+	dec.DontMatchCaseInsensitiveStructFields()
+	return dec.Decode(v)
+}