🔥 Remove unnecessary dependencies

.babelrc

@@ -1,6 +1,5 @@
 {
 	"presets": ["env"],
-	"plugins": ["transform-runtime"],
 	"env": {
 		"test": {
 			"plugins": ["istanbul"]

package.json

@@ -50,10 +50,8 @@
 	"devDependencies": {
 		"babel-cli": "=6.26.0",
 		"babel-plugin-istanbul": "=4.1.5",
-		"babel-plugin-transform-runtime": "=6.23.0",
 		"babel-preset-env": "=1.6.1",
 		"chai": "=4.1.2",
-		"chai-as-promised": "=7.1.1",
 		"coveralls": "=3.0.0",
 		"eslint": "=4.12.0",
 		"eslint-config-airbnb-base": "=12.1.0",
@@ -63,11 +61,6 @@
 		"lint-staged": "=5.0.0",
 		"mocha": "=4.0.1",
 		"nyc": "=11.3.0",
-		"prettier": "=1.8.2",
-		"sinon": "=4.1.2",
-		"sinon-chai": "=2.14.0"
-	},
-	"dependencies": {
-		"babel-runtime": "=6.26.0"
+		"prettier": "=1.8.2"
 	}
 }