fix: circleci config

Author: JadTermsani

Diff for: package.json

@@ -12,6 +12,7 @@
   },
   "dependencies": {
     "@types/mocha": "^5.2.5",
+    "@types/chai": "^4.1.7",
     "@types/node": "^10.12.21"
   },
   "devDependencies": {

Diff for: src/App.spec.ts

@@ -1,5 +1,5 @@
-const { add } = require('./App');
-const chai = require('chai');
+import chai from 'chai';
+import { add } from './App';
 
 const should = chai.should();
 

Diff for: tslint.json

@@ -9,6 +9,7 @@
     "no-conditional-assignment": true,
     "no-consecutive-blank-lines": false,
     "quotemark": [true, "single"],
+    "arrow-parens": [true, "ban-single-arg-parens"],
     "no-console": {
       "severity": "warning",
       "options": ["debug", "info", "log", "time", "timeEnd", "trace"]

Diff for: yarn.lock

@@ -2,6 +2,11 @@
 # yarn lockfile v1
 
 
+"@types/chai@^4.1.7":
+  version "4.1.7"
+  resolved "https://registry.yarnpkg.com/@types/chai/-/chai-4.1.7.tgz#1b8e33b61a8c09cbe1f85133071baa0dbf9fa71a"
+  integrity sha512-2Y8uPt0/jwjhQ6EiluT0XCri1Dbplr0ZxfFXUz+ye13gaqE8u5gL5ppao1JrUYr9cIip5S6MvQzBS7Kke7U9VA==
+
 "@types/mocha@^5.2.5":
   version "5.2.5"
   resolved "https://registry.yarnpkg.com/@types/mocha/-/mocha-5.2.5.tgz#8a4accfc403c124a0bafe8a9fc61a05ec1032073"