Step Functions: Support Unicode and other valid javascript variable names.

[thantos]

https://mathiasbynens.be/notes/javascript-properties

  test("unicode variable names", () => {
    const { stack } = initStepFunctionApp();
    const definition = new StepFunction(stack, "machine1", async () => {
      var HECOMḚṮH = 42;
      const _ = "___";
      const $ = "$$";
      const ƒ = {
        π: Math.PI,
        ø: [],
        Ø: NaN,
        e: 2.7182818284590452353602874713527,
        root2: 2.7182818284590452353602874713527,
        α: 2.5029,
        δ: 4.6692,
        ζ: 1.2020569,
        φ: 1.61803398874,
        γ: 1.30357,
        K: 2.685452001,
        oo: 9999999999e999 * 9999999999e9999,
        A: 1.2824271291,
        C10: 0.12345678910111213141516171819202122232425252728293031323334353637,
        c: 299792458,
      };
      return { ƒ, out: `${HECOMḚṮH}${_}${$}` };
    }).definition;

    expect(normalizeDefinition(definition)).toMatchSnapshot();
  });