DEPS: Bump mcp from 0.8.0 to 0.9.2

[dependabot]

Bumps mcp from 0.8.0 to 0.9.2.

• Release notes
• Changelog
• Commits

[github-actions]

PR body updated to plaintext for easier squash-merging. Original body content below:

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Bumps mcp from 0.8.0 to 0.9.2.

Release notes

Sourced from mcp's releases.

v0.9.2

Fixed

• Use accessor method in server_context_with_meta instead of ivar (#273)
• Reject duplicate SSE connections with 409 to prevent stream hijacking

v0.9.1

Added

• Allow Client#call_tool to accept a tool name (#266)

Fixed

• Return 404 for invalid session ID in handle_delete (#261)

v0.9.0

Added

• MCP::Client::Stdio transport (#262)
• Progress notifications per MCP specification (#254)
• Automatic _meta parameter extraction support (#172)
• CORS and Accept wildcard support for browser-based MCP clients (#253)

Changed

• Use autoload to defer loading of unused subsystems (#255)
• Reduce release package size (#239)

Fixed

• Return 404 for invalid session ID in handle_regular_request (#257)
• Use mutex-protected session_exists? in handle_regular_request (#258)

Changelog

Sourced from mcp's changelog.

[0.9.2] - 2026-03-27

Fixed

• Use accessor method in server_context_with_meta instead of ivar (#273)
• Reject duplicate SSE connections with 409 to prevent stream hijacking

[0.9.1] - 2026-03-23

Added

• Allow Client#call_tool to accept a tool name (#266)

Fixed

• Return 404 for invalid session ID in handle_delete (#261)

[0.9.0] - 2026-03-20

Added

• MCP::Client::Stdio transport (#262)
• Progress notifications per MCP specification (#254)
• Automatic _meta parameter extraction support (#172)
• CORS and Accept wildcard support for browser-based MCP clients (#253)

Changed

• Use autoload to defer loading of unused subsystems (#255)
• Reduce release package size (#239)

Fixed

• Return 404 for invalid session ID in handle_regular_request (#257)
• Use mutex-protected session_exists? in handle_regular_request (#258)

Commits

• 3fc7bcd Merge pull request #272 from koic/release_0_9_2
• 8fbc2b4 Release 0.9.2
• 6b09279 Merge pull request #273 from koic/use_accessor_in_server_context_with_meta
• a2575b2 Use accessor method in server_context_with_meta instead of ivar
• e189d78 Merge commit from fork
• db40143 Reject duplicate SSE connections with 409 to prevent stream hijacking
• 3b1fc72 Merge pull request #267 from koic/release_0_9_1
• f29259c Release 0.9.1
• ccddd87 Merge pull request #266 from koic/allow_client_call_tool_to_accept_a_tool_name
• 73070f1 Allow Client#call_tool to accept a tool name
• Additional commits viewable in compare view

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[dependabot]

Superseded by #1618.