Make the SwampyerError class extend the Error class

.github/workflows/node.js.yml

@@ -15,13 +15,13 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 16.x]
+        node-version: [24.x, 22.x, 20.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v2
+      uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node-version }}
         cache: 'npm'

.github/workflows/npm-publish.yml

@@ -11,16 +11,17 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version: 22
+          cache: 'npm'
       - run: npm ci
       - run: npm run lint
       - run: npm run test
       - run: npm run build
       - name: Cache build
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         id: restore-build
         with:
           path: ./lib
@@ -30,13 +31,13 @@ jobs:
     needs: build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version: 22
           registry-url: https://registry.npmjs.org/
       - name: Restore build cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         id: restore-build
         with:
           path: ./lib

.github/workflows/typedoc-gh-pages.yml

@@ -25,15 +25,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup Pages
-        uses: actions/configure-pages@v2
+        uses: actions/configure-pages@v5
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: 'npm'
       - name: Build with typedoc
         run: |
           npm ci
           npm run gen-docs
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v1
+        uses: actions/upload-pages-artifact@v3
 
   # Deployment job
   deploy:
@@ -45,4 +50,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v1
+        uses: actions/deploy-pages@v4

package.json

@@ -1,6 +1,6 @@
 {
   "name": "swampyer",
-  "version": "1.5.1",
+  "version": "1.5.2",
   "description": "A lightweight WAMP client implementing the WAMP v2 basic profile",
   "main": "lib/index.js",
   "module": "lib/index.js",
@@ -41,4 +41,4 @@
     "typedoc": "^0.22.10",
     "typescript": "^4.4.3"
   }
-}
+}

src/errors.ts

@@ -1,10 +1,4 @@
-export class SwampyerError {
-  constructor(public readonly message?: string) {}
-
-  toString() {
-    return this.message;
-  }
-}
+export class SwampyerError extends Error {}
 
 export class SwampyerOperationError extends SwampyerError {
   constructor(