ci: update node versions

.circleci/config.yml

@@ -22,13 +22,20 @@ commands:
           key: v1-dependencies-<< parameters.version >>-{{ checksum "package.json" }}
       - run: npm test
 jobs:
-  node-19:
+  node-21:
     docker:
-      - image: cimg/node:19.4
+      - image: cimg/node:21.6
     working_directory: ~/repo
     steps:
       - run_tests:
-          version: "19"
+          version: "21"
+  node-20:
+    docker:
+      - image: cimg/node:20.11
+    working_directory: ~/repo
+    steps:
+      - run_tests:
+          version: "20"
   node-18:
     docker:
       - image: cimg/node:18.13
@@ -43,19 +50,11 @@ jobs:
     steps:
       - run_tests:
           version: "16"
-  node-14:
-    docker:
-      - image: cimg/node:14.21
-    working_directory: ~/repo
-    steps:
-      - run_tests:
-          version: "14"
 
 workflows:
-  version: 2
   build:
     jobs:
-      - node-19
+      - node-21
+      - node-20
       - node-18
       - node-16
-      - node-14