Add Bryan's core code

packages/core/__tests__/lib.test.ts

@@ -0,0 +1,29 @@
+'use strict';
+
+import * as core from '../src/lib'
+
+describe('@actions/core', () => {
+    it('needs tests', () => {
+        
+    });
+});
+
+
+// it('exits successfully', () => {
+//   jest.spyOn(process, 'exit').mockImplementation()
+//   core.fail('testing fail');
+//   exit.success()
+//   expect(process.exit).toHaveBeenCalledWith(0)
+// })
+
+// it('exits as a failure', () => {
+//   jest.spyOn(process, 'exit').mockImplementation()
+//   exit.failure()
+//   expect(process.exit).toHaveBeenCalledWith(1)
+// })
+
+// it('exits neutrally', () => {
+//   jest.spyOn(process, 'exit').mockImplementation()
+//   exit.neutral()
+//   expect(process.exit).toHaveBeenCalledWith(78)
+// })