Add @typescript-eslint/lines-between-class-members rule

https://github.com/eslint/eslint/blob/master/docs/rules/lines-between-class-members.md#options

Author: sindresorhus

index.js

@@ -159,6 +159,16 @@ module.exports = {
 		],
 		'keyword-spacing': 'off',
 		'@typescript-eslint/keyword-spacing': 'error',
+		'lines-between-class-members': 'off',
+		'@typescript-eslint/lines-between-class-members': [
+			'error',
+			'always',
+			{
+				// Workaround to allow class fields to not have lines between them.
+				// TODO: Get ESLint to add an option to ignore class fields.
+				exceptAfterSingleLine: true
+			}
+		],
 		'@typescript-eslint/member-delimiter-style': [
 			'error',
 			{

package.json

@@ -44,15 +44,15 @@
 		"simple"
 	],
 	"devDependencies": {
-		"@typescript-eslint/eslint-plugin": "^2.30.0",
-		"@typescript-eslint/parser": "^2.30.0",
+		"@typescript-eslint/eslint-plugin": "^2.33.0",
+		"@typescript-eslint/parser": "^2.31.0",
 		"ava": "^2.4.0",
 		"eslint": "^6.8.0",
 		"temp-write": "^4.0.0",
-		"typescript": "^3.8.3"
+		"typescript": "^3.9.2"
 	},
 	"peerDependencies": {
-		"@typescript-eslint/eslint-plugin": ">=2.30.0",
+		"@typescript-eslint/eslint-plugin": ">=2.33.0",
 		"eslint": ">=6.6.0",
 		"typescript": ">=3.5.3"
 	}