chore: remove grunt, update dependencies, bump version to 2.1.1.

.eslintrc.json

@@ -1,13 +1,18 @@
 {
-  "extends": "airbnb-base",
+  "root": true,
+  "env": {
+    "browser": true
+  },
+  "extends": [
+    "airbnb-base"
+  ],
+  "parserOptions": {
+    "ecmaVersion": 11,
+    "sourceType": "module"
+  },
   "rules": {
-    "linebreak-style": ["off"],
     "comma-dangle": ["error", "never"],
+    "linebreak-style": ["off"],
     "no-underscore-dangle": ["off"]
-  },
-	"env": {
-		"browser": true,
-		"node": true,
-		"es6": true
-	}
+  }
 }

.markdownlint.json

@@ -0,0 +1,23 @@
+{
+  "default": true,
+  "line-length": false,
+  "blanks-around-headers": false,
+  "no-duplicate-header": false,
+  "no-inline-html": false,
+  "MD010": false,
+  "MD001": false,
+  "MD031": false,
+  "MD040": false,
+  "MD002": false,
+  "MD029": false,
+  "MD041": false,
+  "MD032": false,
+  "MD036": false,
+  "MD037": false,
+  "MD009": false,
+  "MD018": false,
+  "MD012": false,
+  "MD026": false,
+  "MD034": false,
+  "MD038": false
+}

CHANGELOG.md

@@ -3,13 +3,19 @@
 All notable changes to this project is documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [2.1.1]
+
+This is a maintenance release to modernize the development environment. There are no changes in the code of the module so these updates should not affec the functionality of the module.
+- Get rid of Grunt, use native npm scripts instead to run the linters.
+- Update all dependencies to the latest versions.
+
 ## [2.1.0]
 
 - Allow stock change to be shown as percent - thanks to [Reese Wells](https://github.com/ducoterra).
 
 ## [2.0.1]
 
-This is a maintenance release that updates all third party developer dependencies to the latest version and fix security vulnerability [CVE-2019-10744 ](https://github.com/lodash/lodash/pull/4336) in the third-party developer dependency `lodash` module.
+This is a maintenance release that updates all third party developer dependencies to the latest version and fix security vulnerability [CVE-2019-10744](https://github.com/lodash/lodash/pull/4336) in the third-party developer dependency `lodash` module.
 
 This change should not affect the functionality of the module.
 

README.md

@@ -96,16 +96,10 @@ Although for operation this module does not depend on any other module, if you w
 npm install
 ```
 
-2. Install Grunt:
+2. Run all linters:
 
 ```bash
-npm install -g grunt
-```
-
-3. Use Grunt to run all linters:
-
-```bash
-grunt
+npm run lint
 ```
 
 ## Got feedback?