update CI environments

Author: gfx

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ on:
 
 jobs:
   nodejs:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         node-version:
@@ -33,7 +33,7 @@ jobs:
     - run: codecov -f coverage/*.json
 
   browser:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         browser: [ChromeHeadless, FirefoxHeadless]

.github/workflows/fuzz.yml

@@ -19,7 +19,7 @@ jobs:
       uses: actions/setup-node@v2
       with:
         cache: npm
-        node-version: "16"
+        node-version: "18"
 
     - run: npm ci
     - run: npm run test:fuzz