Update mcp dependency to >=1.8,<2

[zhulinchng]

Problem

Running:

uvx uc-mcp-proxy \
  --url  <url> \
  --profile  <profile> \
  --auth-type <auth-type>

fails with:

ValueError: not enough values to unpack (expected 3, got 2)

Root cause

uc-mcp-proxy 0.5.0 expects mcp.client.streamable_http.streamable_http_client() to return 3 values.

But the installed mcp 2.0.0 returns only 2 values because MCP v2 removed the get_session_id callback.

So this is a version incompatibility between:

• uc-mcp-proxy 0.5.0
• mcp 2.0.0

Recommendation

Until uc-mcp-proxy publishes MCP v2 compatibility, keep mcp pinned to <2 or 1.12.4.