ci: update to node 20 (#310)

Author: tomarra

action.yml

@@ -16,5 +16,5 @@ inputs:
     description: 'list of files you would like to exclude from coverage'
     required: false
 runs:
-  using: 'node16'
+  using: 'node20'
   main: 'dist/index.js'

dist/index.js

@@ -16,7 +16,7 @@
     "url": "git+https://github.com/VeryGoodOpenSource/very_good_coverage.git"
   },
   "engines": {
-    "node": ">=16.17.0 <17"
+    "node": ">=20"
   },
   "keywords": [
     "GitHub",