chore: add jest config, fix tslint

jest.config.js

@@ -0,0 +1,13 @@
+module.exports = {
+  moduleFileExtensions: ["ts", "js"],
+  transform: {
+    "\\.ts$": "ts-jest"
+  },
+  globals: {
+    "ts-jest": {
+      tsConfig: "tsconfig.json"
+    }
+  },
+  testMatch: ["**/test/**/*.test.ts"],
+  testPathIgnorePatterns: ["/node_modules/"]
+};

src/test/example.test.ts

@@ -1,3 +1,3 @@
-test('1 + 1 = 2', () => {
+test("1 + 1 = 2", () => {
     expect(1 + 1).toEqual(2);
 });