Remove legacy Node.js support

Author: bobisjan

.babelrc

@@ -1,3 +1 @@
 node_modules
-dist/
-tmp/

.gitignore

@@ -2,4 +2,3 @@
 .jshintrc
 .travis.yml
 test/
-tmp/

.npmignore

@@ -27,7 +27,7 @@ particular, you can provide a custom:
 
 ## Requirements
 
-FastBoot App Server requires Node.js v4.2 or later.
+FastBoot App Server requires Node.js v8 or later.
 
 ## Quick Start
 

README.md

@@ -31,14 +31,10 @@
     "express": "^4.13.3",
     "fastboot": "^2.0.0",
     "fastboot-express-middleware": "^2.0.0",
-    "fs-promise": "^2.0.3",
     "request": "^2.81.0"
   },
   "devDependencies": {
-    "babel-core": "^6.10.4",
-    "babel-preset-es2015": "^6.9.0",
     "chai": "^4.1.0",
-    "ember-cli": "^2.10.2",
     "mocha": "^5.0.0",
     "request-promise": "^4.2.1"
   }