[COMPLIANCE] Add copyright and license headers

wrapper/lib/output-listener.js

@@ -1,3 +1,8 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
 /**
  * Acts as a listener for @actions/exec, by capturing STDOUT and STDERR
  * streams, and exposing them via a contents attribute.

wrapper/lib/terraform-bin.js

@@ -1,3 +1,8 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
 const os = require('os');
 const path = require('path');
 

wrapper/terraform.js

@@ -1,4 +1,9 @@
 #!/usr/bin/env node
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
 const io = require('@actions/io');
 const core = require('@actions/core');
 const { exec } = require('@actions/exec');

wrapper/test/output-listener.test.js

@@ -1,3 +1,8 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
 const OutputListener = require('../lib/output-listener');
 
 describe('output-listener', () => {