build without yaml step setup

Signed-off-by: shmck <shawn.j.mckay@gmail.com>

Author: ShMcK

src/schema/skeleton.ts

@@ -171,7 +171,7 @@ export default {
                   ],
                 },
               },
-              required: ["id", "setup"],
+              required: ["id"],
             },
           },
         },

tests/skeleton.test.ts

@@ -217,7 +217,7 @@ describe("validate skeleton", () => {
     const valid = validateSkeleton(json);
     expect(valid).toBe(false);
   });
-  it("should fail if step setup is missing", () => {
+  it("should not fail if step setup is missing", () => {
     const step1 = { ...validJson.levels[0].steps[0], setup: undefined };
     const level1 = { ...validJson.levels[0], steps: [step1] };
     const json = {
@@ -226,7 +226,7 @@ describe("validate skeleton", () => {
     };
 
     const valid = validateSkeleton(json);
-    expect(valid).toBe(false);
+    expect(valid).toBe(true);
   });
   it("should fail if step setup is invalid", () => {
     const step1 = {