feat: add node16 support (#922)

* feat: add node16 support

Signed-off-by: hackercat <me@hackerc.at>

* feat: bump images to node16

Signed-off-by: hackercat <me@hackerc.at>

* lint(editorconfig): ignore *.md due to mixed style

Signed-off-by: hackercat <me@hackerc.at>

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

act/runner/testdata/shells/python/push.yml

@@ -11,7 +11,7 @@ jobs:
           print(platform.python_version())
   check-container:
     runs-on: ubuntu-latest
-    container: node:12-buster
+    container: node:16-buster
     steps:
       - shell: ${{ env.MY_SHELL }}
         run: |