add prettier and eslint

package.json

@@ -13,28 +13,69 @@
     "bdd"
   ],
   "scripts": {
-    "test": "grunt jshint execSpecsInNode"
+    "pretest": "eslint src/**/*.js spec/**/*.js && prettier --check src/**/*.js spec/**/*.js",
+    "test": "grunt execSpecsInNode",
+    "cleanup": "prettier --write src/**/*.js spec/**/*.js"
   },
   "description": "Official packaging of Jasmine's core files for use by Node.js projects.",
   "homepage": "https://jasmine.github.io",
   "main": "./lib/jasmine-core.js",
   "devDependencies": {
     "ejs": "^2.5.5",
+    "eslint": "^5.16.0",
     "express": "^4.16.4",
     "fast-glob": "^2.2.6",
     "grunt": "^1.0.4",
     "grunt-cli": "^1.3.2",
     "grunt-contrib-compress": "^1.3.0",
     "grunt-contrib-concat": "^1.0.1",
-    "grunt-contrib-jshint": "^2.1.0",
     "grunt-css-url-embed": "^1.11.1",
     "grunt-sass": "^3.0.2",
     "jasmine": "^3.4.0",
     "jsdom": "^15.0.0",
     "load-grunt-tasks": "^4.0.0",
     "node-sass": "^4.11.0",
+    "prettier": "1.17.1",
     "selenium-webdriver": "^3.6.0",
     "shelljs": "^0.8.3",
     "temp": "^0.9.0"
+  },
+  "prettier": {
+    "singleQuote": true
+  },
+  "eslintConfig": {
+    "rules": {
+      "quotes": [
+        "error",
+        "single",
+        {
+          "avoidEscape": true
+        }
+      ],
+      "no-unused-vars": [
+        "error",
+        {
+          "args": "none"
+        }
+      ],
+      "block-spacing": "error",
+      "comma-dangle": [
+        "error",
+        "never"
+      ],
+      "func-call-spacing": [
+        "error",
+        "never"
+      ],
+      "key-spacing": "error",
+      "no-tabs": "error",
+      "no-trailing-spaces": "error",
+      "no-whitespace-before-property": "error",
+      "semi": [
+        "error",
+        "always"
+      ],
+      "space-before-blocks": "error"
+    }
   }
 }