ci(workflows): [ci] test on node version 21

Signed-off-by: Lexus Drumgold <[email protected]>

Author: unicornware

.codecov.yml

@@ -4,12 +4,12 @@
 ---
 codecov:
   notify:
-    after_n_builds: 5
+    after_n_builds: 6
     wait_for_ci: true
   require_ci_to_pass: true
 
 comment:
-  after_n_builds: 5
+  after_n_builds: 6
   behavior: default
   layout: header,diff,flags,components,tree,footer
   require_base: false
@@ -100,6 +100,10 @@ flags:
     carryforward: false
     paths:
       - src/
+  node21:
+    carryforward: false
+    paths:
+      - src/
 
 github_checks:
   annotations: true

.github/infrastructure.yml

@@ -38,6 +38,7 @@ branches:
           - context: test (24)
           - context: test (23)
           - context: test (22)
+          - context: test (21)
           - context: test-bun (canary)
           - context: test-bun (latest)
           - context: typescript

.github/workflows/ci.yml

@@ -251,6 +251,7 @@ jobs:
           - 24
           - 23
           - 22
+          - 21
     steps:
       - id: checkout
         name: Checkout ${{ env.REF_NAME }}