chore: Trigger run with node 16 & bump @actions/core to latest version

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,5 @@
+### What
+// Describe what this PR should do
+
+### How
+// Describe how you implemented it

.github/workflows/build.yml

@@ -34,7 +34,7 @@ jobs:
           report_paths: python/report.xml
       - uses: actions/setup-node@v1
         with:
-          node-version: 12
+          node-version: 16
       - uses: actions/cache@v1
         with:
           path: ~/.npm

action.yml

@@ -36,5 +36,5 @@ outputs:
      description: 'the test outcome, either `success` or `failure`'
 
 runs:
-  using: 'node12'
+  using: 'node16'
   main: 'dist/index.js'