restored the -s alias

bin/cli.js

@@ -3,7 +3,6 @@ function validNodeVersion () {
   var valid = false
   try {
     const semver = require('semver')
-    debugger
     valid = semver.gte(require('process').version, '7.6.0')
   } catch (err) {}
   return valid

package.json

@@ -45,7 +45,7 @@
     "lws-mock-response": "^0.4.6",
     "lws-request-monitor": "^0.1.5",
     "lws-rewrite": "^0.3.6",
-    "lws-spa": "^0.2.3",
+    "lws-spa": "^0.2.4",
     "lws-static": "^0.4.1",
     "semver": "^5.3.0"
   },