Add ESLint. Move from mocha to Jest

Author: Sleavely

.eslintignore

@@ -0,0 +1,3 @@
+coverage/
+dist/
+node_modules/

.eslintrc.json

@@ -0,0 +1,10 @@
+{
+  "extends": "standard",
+  "rules": {
+    "comma-dangle": ["error", "always-multiline"],
+    "no-trailing-spaces": "error"
+  },
+  "env": {
+    "jest": true
+  }
+}

package.json

@@ -13,14 +13,28 @@
     "UPC",
     "GS1"
   ],
-  "dependencies": {},
-  "devDependencies": {
-    "chai": "~1.8.1",
-    "mocha": "~1.17.0"
-  },
   "main": "lib/main.js",
   "scripts": {
-    "test": "./node_modules/.bin/mocha --reporter spec"
+    "test": "jest --verbose --silent && eslint ."
+  },
+  "dependencies": {
+  },
+  "devDependencies": {
+    "@types/jest": "^24.0.18",
+    "eslint": "^5.16.0",
+    "eslint-config-standard": "^12.0.0",
+    "eslint-plugin-import": "^2.18.2",
+    "eslint-plugin-node": "^9.2.0",
+    "eslint-plugin-promise": "^4.2.1",
+    "eslint-plugin-standard": "^4.0.1",
+    "jest": "^24.9.0",
+    "jest-extended": "^0.11.2"
+  },
+  "jest": {
+    "testEnvironment": "node",
+    "setupFilesAfterEnv": [
+      "jest-extended"
+    ]
   },
   "license": "MIT"
 }