chore(package): update babel to v7

Update `jest` devDependency to `^24.1.0`
Add `@babel-cli`, `@babel/plugin-proposal-object-rest-spread`, `@babel/plugin-transform-runtime` and `@babel/preset-env` devDependencies
Remove `babel-cli`, `babel-plugin-transform-decorators-legacy`, `babel-plugin-transform-object-rest-spread`, `babel-plugin-transform-runtime` and `babel-preset-env` devDependencies
Remove `needlepoint` dependency

Author: medfreeman

package.json

@@ -10,8 +10,8 @@
     "lint": "eslint --ignore-path .gitignore --fix \"**/*.js\"",
     "test": "cross-env NODE_ENV=test DEBUG=nuxt:netlify-cms jest --runInBand --forceExit",
     "pretest": "yarn lint",
-    "build": "babel --ignore /__tests__/,/__mocks__/ -d ./dist ./src",
-    "watch": "babel -w  --ignore /__tests__/,/__mocks__/ -d ./dist ./src",
+    "build": "babel --ignore src/**/__tests__/,src/**/__mocks__/ -d ./dist ./src",
+    "watch": "babel -w  --ignore src/**/__tests__/,src/**/__mocks__/ -d ./dist ./src",
     "release": "standard-version; git push --follow-tags",
     "prepare": "yarn build"
   },
@@ -23,20 +23,18 @@
     "@nuxt/friendly-errors-webpack-plugin": "^2.4.0",
     "extract-css-chunks-webpack-plugin": "^3.3.2",
     "js-yaml": "^3.10.0",
-    "needlepoint": "^1.0.5",
     "style-loader": "^0.23.0"
   },
   "peerDependencies": {
     "netlify-cms": ">=0.4.0"
   },
   "devDependencies": {
+    "@babel/cli": "^7.2.3",
+    "@babel/plugin-proposal-object-rest-spread": "^7.3.2",
+    "@babel/plugin-transform-runtime": "^7.2.0",
+    "@babel/preset-env": "^7.3.1",
     "@nuxt/common": "^2.3.4",
-    "babel-cli": "^6.26.0",
     "babel-eslint": "^10.0.1",
-    "babel-plugin-transform-decorators-legacy": "^1.3.4",
-    "babel-plugin-transform-object-rest-spread": "^6.26.0",
-    "babel-plugin-transform-runtime": "^6.23.0",
-    "babel-preset-env": "^1.6.0",
     "codecov": "^3.0.0",
     "cross-env": "^5.0.5",
     "eslint": "^5.0.1",
@@ -47,7 +45,7 @@
     "eslint-plugin-jest": "^22.0.0",
     "git-exec-and-restage": "^1.0.1",
     "husky": "^1.1.3",
-    "jest": "^23.5.0",
+    "jest": "^24.1.0",
     "koa": "^2.3.0",
     "koa-static": "^5.0.0",
     "lint-staged": "^8.0.4",
@@ -68,16 +66,15 @@
     ]
   },
   "babel": {
-    "presets": "babel-preset-env",
+    "presets": ["@babel/preset-env"],
     "plugins": [
-      "transform-runtime",
+      "@babel/plugin-transform-runtime",
       [
-        "transform-object-rest-spread",
+        "@babel/plugin-proposal-object-rest-spread",
         {
           "useBuiltIns": true
         }
-      ],
-      "transform-decorators-legacy"
+      ]
     ],
     "env": {
       "test": {

src/utils/cms.config.file.js

@@ -1,8 +1,5 @@
-import { singleton } from "needlepoint";
-
 import { loadYAMLFile } from "./yaml";
 
-@singleton
 class CmsConfig {
   constructor(fileName) {
     this._fileName = fileName;