Issue #78 - Add jest and jest eslint integration

.eslintrc.js

@@ -2,6 +2,7 @@ module.exports = {
   env: {
     es6: true,
     node: true,
+    jest: true,
   },
   extends: [
     "eslint:recommended",

package.json

@@ -37,11 +37,13 @@
     "eslint": "^6.7.1",
     "eslint-config-prettier": "^6.7.0",
     "eslint-plugin-import": "^2.18.0",
+    "eslint-plugin-jest": "^23.0.5",
     "eslint-plugin-prettier": "^3.1.1",
     "husky": "^3.1.0",
+    "jest": "^24.9.0",
     "lint-staged": "^9.4.3",
-    "prettier": "^1.19.1",
-    "npm-run-all": "^4.1.5"
+    "npm-run-all": "^4.1.5",
+    "prettier": "^1.19.1"
   },
   "husky": {
     "hooks": {