support oneOf

[shanejonas]

some failing tests i wrote

src/index.test.ts

  describe("handles validation for oneOf", () => {
    it("returns true when the data is valid", () => {
      const testSchema = {
        oneOf: [{ type: "string" }, { type: "number" }],
      } as JSONSchema;

      const result = validator(testSchema, "potato") as any;

      expect(result).toBe(true);
    });

    it("returns true when the data is null", () => {
      const testSchema = {
        oneOf: [{ type: "string" }, { type: "null" }],
      } as JSONSchema;

      const result = validator(testSchema, null) as any;

      expect(result).toBe(true);
    });
  });

Result