Expose stdin for future uses of runContinuous

Author: rubennorte

e2e/runJest.js

@@ -181,6 +181,10 @@ export const runContinuous = function(
       return {stderr, stdout};
     },
 
+    getInput() {
+      return jestPromise.stdin;
+    },
+
     waitUntil(fn: ConditionFunction): Promise<void> {
       return new Promise(resolve => {
         const check = state => {