Upgraded dependencies

action.yml

@@ -32,5 +32,5 @@ inputs:
     description: 'Content type associated with the values'
     required: false    
 runs:
-  using: 'node12'
+  using: 'node20'
   main: 'lib/index.js'

babel.config.js

@@ -0,0 +1,4 @@
+// flat version 6.0.0 shipped as an ESModule, we need babel to help transpile to common.js
+module.exports = {
+    presets: [['@babel/preset-env', {targets: {node: 'current'}}]],
+  };

jest.config.js

@@ -4,6 +4,10 @@ module.exports = {
   testEnvironment: 'node',
   testMatch: ['**/tests/*.test.ts'],
   transform: {
-    '^.+\\.ts$': 'ts-jest'
-  }
+    '^.+\\.ts$': 'ts-jest',
+    "^.+\\.(js|jsx)$": "babel-jest"
+  },
+  transformIgnorePatterns: [
+    "node_modules/(?!(flat))"
+  ]
 }