chore: drop Node 18 from CI matrix, fix useObservable test for Vitest 4

Vite 8 (via rolldown) requires Node 20+ for styleText from node:util.
Update CI test matrix to Node 20/22 and build/publish jobs to Node 20.
Node 18 reached EOL in April 2025.

Also fix the "throws an error if no observableId is provided" test which
was failing under Vitest 4. React 18 dispatches a window error event
when a component throws during render, even when the throw is caught by
expect().toThrow(). Vitest 4 surfaces these as uncaught errors. Fix by
adding a window error listener that calls preventDefault(), and match on
the error message via expect.objectContaining to account for React
setting _suppressLogging on the error object.

Also widen the firebase peerDependency to accept v10/v11/v12.

Author: tyler-reitz

.github/workflows/test.yaml

@@ -23,7 +23,7 @@ jobs:
       - name: Setup node
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: '20'
           cache: 'npm'
       - name: Install deps
         run: npm ci
@@ -44,7 +44,7 @@ jobs:
     needs: build
     strategy:
       matrix:
-        node: ["18", "20"]
+        node: ["20", "22"]
       fail-fast: false
     name: Test Node.js ${{ matrix.node }} (Ubuntu)
     steps:
@@ -83,7 +83,7 @@ jobs:
       - name: Setup node
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: '20'
           registry-url: 'https://registry.npmjs.org'
       - name: 'Download Artifacts'
         uses: actions/download-artifact@v4

package.json

@@ -36,7 +36,7 @@
     "docs:fork": "typedoc --options typedoc.json --gitRemote upstream && markdown-toc -i docs/use.md"
   },
   "peerDependencies": {
-    "firebase": "^9.0.0 || next",
+    "firebase": "^9.0.0 || ^10.0.0 || ^11.0.0 || ^12.0.0 || next",
     "react": ">=16 || experimental"
   },
   "husky": {

test/useObservable.test.tsx

@@ -137,14 +137,23 @@ describe('useObservable', () => {
       const spy = vi.spyOn(console, 'error');
       spy.mockImplementation(() => {});
 
+      // React 18 dispatches a window error event when a component throws during render
+      // even when caught by expect().toThrow(). Prevent it from surfacing as an uncaught
+      // error in environments where Vitest treats those as test failures.
+      // Note: e.preventDefault() causes React to set _suppressLogging:true on the error,
+      // so we match on message only via expect.objectContaining.
+      const onError = (e: ErrorEvent) => e.preventDefault();
+      window.addEventListener('error', onError);
+
       const observable$: Subject<any> = new Subject();
 
       // @ts-expect-error we're trying to break useObservable
       expect(() => renderHook(() => useObservable(undefined, observable$, { suspense: true }))).toThrow(
-        Error('cannot call useObservable without an observableId')
+        expect.objectContaining({ message: 'cannot call useObservable without an observableId' })
       );
 
       spy.mockRestore();
+      window.removeEventListener('error', onError);
     });
 
     it('can return a startval and then the observable once it is ready', () => {