Refactor action to typescript (#226)

* Refactor to typescript (config part)

* Refactor to typescript (convert extensions, minor fixes)

* Refactor to typescript (move from `action` to `dist`)

* Re-enable integrity-check for dist index.js

* Fix all tests and lints

* fix parsing major versions

* Test patch level to be digits only

* debug

* debug

* uncache

* manual compile

* debug

* debug

* Debug

* Build lib - doh

* remove diff check

* Make kubernetes workflow manual

* Properly generate 3 digit for simple major tags

* Remove ts-ignore

* re-enable cache

src/model/unity.test.ts

@@ -0,0 +1,13 @@
+import Unity from './unity';
+
+describe('Unity', () => {
+  describe('libraryFolder', () => {
+    it('does not throw', () => {
+      expect(() => Unity.libraryFolder).not.toThrow();
+    });
+
+    it('returns a string', () => {
+      expect(typeof Unity.libraryFolder).toStrictEqual('string');
+    });
+  });
+});