Unexpected token ; Emberfire not installing with ember-cli - node.js

Question

I have been breaking my head on installing emberfire to set up a backend and database for working with my front end ember app. I cleaned up node_modules, did a fresh npm install and also did npm cache clean. Gave up trying to fix it.
When i run,
$ ember install emberfire
i am getting below error.
Installed packages for tooling via npm.
Unexpected token ;
SyntaxError: Unexpected token ;
at exports.runInThisContext (vm.js:53:16)
at Module._compile (module.js:373:25)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)
at Project.require (C:\Users\vignesh\Documents\Developer\MyTechStack\library-ember-app\node_modules\ember-cli\lib\models\project.js:285:12)
at Project.config (C:\Users\vignesh\Documents\Developer\MyTechStack\library-ember-app\node_modules\ember-cli\lib\models\project.js:201:26)
at CoreObject.extend.install (C:\Users\vignesh\Documents\Developer\MyTechStack\library-ember-app\node_modules\ember-cli\lib\models\blueprint.js:435:34)
Steps i tried till now
Cleaned the node_modules and did npm install again.
Installed ember-cli globally.
Cleared the cache.
My package.json looks like this
{
"name": "library-ember-app",
"version": "0.0.0",
"description": "Small description for library-ember-app goes here",
"private": true,
"directories": {
"doc": "doc",
"test": "tests"
},
"scripts": {
"build": "ember build",
"start": "ember server",
"test": "ember test"
},
"repository": "",
"engines": {
"node": ">= 0.10.0"
},
"author": "",
"license": "MIT",
"devDependencies": {
"broccoli-asset-rev": "^2.4.2",
"ember-ajax": "^2.0.1",
"ember-cli": "2.7.0",
"ember-cli-app-version": "^1.0.0",
"ember-cli-babel": "^5.1.6",
"ember-cli-bootstrap-sassy": "0.5.3",
"ember-cli-dependency-checker": "^1.2.0",
"ember-cli-htmlbars": "^1.0.3",
"ember-cli-htmlbars-inline-precompile": "^0.3.1",
"ember-cli-inject-live-reload": "^1.4.0",
"ember-cli-jshint": "^1.0.0",
"ember-cli-qunit": "^2.0.0",
"ember-cli-release": "^0.2.9",
"ember-cli-sass": "5.4.0",
"ember-cli-sri": "^2.1.0",
"ember-cli-test-loader": "^1.1.0",
"ember-cli-uglify": "^1.2.0",
"ember-data": "^2.7.0",
"ember-export-application-global": "^1.0.5",
"ember-load-initializers": "^0.5.1",
"ember-resolver": "^2.0.3",
"ember-welcome-page": "^1.0.1",
"emberfire": "2.0.1"
}
}
Bower.json
{
"name": "library-ember-app",
"dependencies": {
"ember": "~2.7.0",
"ember-cli-shims": "0.1.1",
"ember-qunit-notifications": "0.1.0",
"bootstrap-sass": "^3.3.7",
"firebase": "^3.0.0"
}
}