feat(sra.js): add backward support to node 8

BREAKING CHANGE: testing

Author: maumercado

bin/sra.js

@@ -42,7 +42,7 @@ if (major < 10) {
     `You are running Node ${
       currentNodeVersion
     }.\n`
-      + 'Self React App requires Node 10 or higher. \n'
+      + 'Self React App requires Node 8 or higher. \n'
       + 'Please update your version of Node.',
   );
   process.exit(1);