Add missing snapshot.

test/unit/__snapshots__/green-flag.test.jsx.snap

@@ -0,0 +1,19 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`GreenFlag renders active state 1`] = `
+<img
+  className="undefined"
+  onClick={[Function]}
+  src="test-file-stub"
+  title="Go"
+/>
+`;
+
+exports[`GreenFlag renders inactive state 1`] = `
+<img
+  className=""
+  onClick={[Function]}
+  src="test-file-stub"
+  title="Go"
+/>
+`;