use http-server instead of http-server-legacy

package.json

@@ -66,7 +66,7 @@
     "yo-yoify": "^3.7.3"
   },
   "dependencies": {
-    "http-server-legacy": "latest",
+    "http-server": "^0.11.1",
     "remix-plugin": "0.0.2-alpha.6",
     "remixd": "0.1.8-alpha.6"
   },
@@ -182,8 +182,8 @@
     "remixd": "remixd -s ./contracts --remix-ide http://127.0.0.1:8080",
     "selenium": "execr --silent selenium-standalone start",
     "selenium-install": "selenium-standalone install",
-    "serve": "npx http-server-legacy .",
-    "serve_debugger": "npx http-server-legacy src/app/debugger/remix-debugger",
+    "serve": "npx http-server .",
+    "serve_debugger": "npx http-server src/app/debugger/remix-debugger",
     "sourcemap": "exorcist --root ../ build/app.js.map > build/app.js",
     "start": "npm-run-all -lpr serve watch onchange remixd",
     "test": "csslint && standard && node test/index.js",