register spdx lib as ES Module, start converting call sites to use new spdx pkg - TODO: update tests

__tests__/spdx.test.ts

@@ -0,0 +1,11 @@
+import {expect, jest, test} from '@jest/globals'
+import * as spdx from '../src/spdx'
+
+test('hello', () => {
+  expect(spdx.satisfies('MIT', 'MIT')).toBe(true)
+})
+
+test('isValid', () => {
+  expect(spdx.isValid('MIT')).toBe(true)
+  expect(spdx.isValid('FOOBARBAZ')).toBe(false)
+})