chore: bump version to 0.1.6

Signed-off-by: Michael Yuan <michael@secondstate.io>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: juntao

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "fintool"
-version = "0.1.5"
+version = "0.1.6"
 edition = "2021"
 description = "Agentic trading CLIs for crypto, stocks, and prediction markets — Hyperliquid, Binance, Coinbase, OKX, and Polymarket"
 license = "MIT"