Add feature to Lint .editorconfig file

[elarivie]

To make the maintainer's life easier, I...

• created at least 1 spec to cover my changes,
• npm tested my code and it's green like an 🍏,
• adjusted the readme.md, if it was necessary and
• would like to receive get a 🍺 or ☕ after that hard work!

This pull request adds linting feature when editing .editorconfig file.

fixes #141

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IssueHunt Summary

Referenced issues

This pull request has been submitted to:

• #141: Notify user about malformed editorconfig-files

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[elarivie]

This is what it looks like in action:

[Alhadis]

Personally, I'd avoid making linter a package dependency. Simply providing the service should be enough: if users have linter installed, they'll see messages whilst editing .editorconfig files. Those who don't are greeted with a nag screen at startup asking them to install linter, intentions, linter-ui-default, and busy-signal. For a package that only uses the .editorconfig format indirectly, it's pretty overkill and even a little disruptive.

I recommend the following changes. Do this and we can merge. 👍 Don't forget to regenerate the package-lock.json file (run npm i --package-lock-only to update it manually if you need to).

diff --git a/index.js b/index.js
index 1c85cf4..e182e82 100644
--- a/index.js
+++ b/index.js
@@ -388,8 +388,6 @@ module.exports = {
 			this.disposables.dispose();
 		}
 
-		require('atom-package-deps').install('editorconfig');
-
 		this.disposables = new CompositeDisposable(
 			atom.commands.add('atom-workspace', {
 				'EditorConfig:fix-file': () => {
diff --git a/package.json b/package.json
index 429035e..d420f9c 100644
--- a/package.json
+++ b/package.json
@@ -27,17 +27,12 @@
 	"atomTestRunner": "atom-mocha",
 	"dependencies": {
 		"editorconfig": "^0.15.3",
-		"mapped-disposable": "^1.0.3",
-		"atom-linter": "^10.0.0",
-		"atom-package-deps": "^5.0.0"
+		"mapped-disposable": "^1.0.3"
 	},
 	"devDependencies": {
 		"atom-mocha": "^2.2.0",
 		"xo": "^0.24.0"
 	},
-	"package-deps": [
-		"linter"
-	],
 	"xo": {
 		"globals": [
 			"AtomMocha",