release: bump 0.5.0 -> 0.5.1 (#162)

Version bump **0.5.0 → 0.5.1** for the Seasonality & Session family release (12 indicators, PR #161).

Bumped: `Cargo.toml` (workspace version + `wickra-core` dep), `Cargo.lock` (via `cargo build`), `bindings/python/pyproject.toml`, `bindings/node/package.json` (+ 6 `optionalDependencies`), the 6 `bindings/node/npm/<platform>/package.json`, both `package-lock.json` files, and `CHANGELOG.md` (`[Unreleased]` → `[0.5.1]` + compare URLs).

No code changes — version strings only.

bindings/node/package.json

@@ -1,6 +1,6 @@
 {
   "name": "wickra",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "Streaming-first technical indicators: incremental, fast, install-free. Node bindings powered by Rust.",
   "author": "kingchenc <support@wickra.org>",
   "main": "index.js",
@@ -47,12 +47,12 @@
     "node": ">= 18"
   },
   "optionalDependencies": {
-    "wickra-linux-x64-gnu": "0.5.0",
-    "wickra-linux-arm64-gnu": "0.5.0",
-    "wickra-darwin-x64": "0.5.0",
-    "wickra-darwin-arm64": "0.5.0",
-    "wickra-win32-x64-msvc": "0.5.0",
-    "wickra-win32-arm64-msvc": "0.5.0"
+    "wickra-linux-x64-gnu": "0.5.1",
+    "wickra-linux-arm64-gnu": "0.5.1",
+    "wickra-darwin-x64": "0.5.1",
+    "wickra-darwin-arm64": "0.5.1",
+    "wickra-win32-x64-msvc": "0.5.1",
+    "wickra-win32-arm64-msvc": "0.5.1"
   },
   "scripts": {
     "build": "napi build --platform --release",