release: bump 0.7.3 -> 0.7.4 (#221)

Version bump **0.7.3 → 0.7.4** for the B19 Alt-Chart Bars batch (7 new bar builders, 507 → 514).

Bumps `Cargo.toml` (+ `wickra-core` dep), `Cargo.lock`, `pyproject.toml`, the Node `package.json` and its six platform packages, both `package-lock.json` files, and the CHANGELOG (`[Unreleased]` → `[0.7.4]` with compare URLs).

examples/node/package-lock.json

@@ -17,7 +17,7 @@
     },
     "../../bindings/node": {
       "name": "wickra",
-      "version": "0.7.3",
+      "version": "0.7.4",
       "license": "MIT OR Apache-2.0",
       "devDependencies": {
         "@napi-rs/cli": "^2.18.0"
@@ -26,12 +26,12 @@
         "node": ">= 18"
       },
       "optionalDependencies": {
-        "wickra-darwin-arm64": "0.7.3",
-        "wickra-darwin-x64": "0.7.3",
-        "wickra-linux-arm64-gnu": "0.7.3",
-        "wickra-linux-x64-gnu": "0.7.3",
-        "wickra-win32-arm64-msvc": "0.7.3",
-        "wickra-win32-x64-msvc": "0.7.3"
+        "wickra-darwin-arm64": "0.7.4",
+        "wickra-darwin-x64": "0.7.4",
+        "wickra-linux-arm64-gnu": "0.7.4",
+        "wickra-linux-x64-gnu": "0.7.4",
+        "wickra-win32-arm64-msvc": "0.7.4",
+        "wickra-win32-x64-msvc": "0.7.4"
       }
     },
     "node_modules/wickra": {