Add ApiClient tests

Fixes #4

package.json

@@ -5,7 +5,8 @@
   "scripts": {
     "serve": "vue-cli-service serve",
     "build": "vue-cli-service build",
-    "lint": "vue-cli-service lint"
+    "lint": "vue-cli-service lint",
+    "test": "jest"
   },
   "dependencies": {
     "postcss-nested": "^4.1.2",
@@ -16,13 +17,17 @@
     "vue-router": "^3.0.2"
   },
   "devDependencies": {
+    "@babel/core": "^7.4.3",
+    "@babel/preset-env": "^7.4.3",
     "@vue/cli-plugin-babel": "^3.5.1",
     "@vue/cli-plugin-eslint": "^3.5.1",
     "@vue/cli-service": "^3.5.1",
     "@vue/eslint-config-standard": "^4.0.0",
     "babel-eslint": "^10.0.1",
+    "babel-jest": "^24.7.1",
     "eslint": "^5.8.0",
     "eslint-plugin-vue": "^5.0.0",
+    "jest": "^24.7.1",
     "vue-template-compiler": "^2.5.21"
   }
 }