add eslint and gts

package.json

@@ -5,8 +5,8 @@
   "main": "src/index.js",
   "types": "types/index.d.ts",
   "scripts": {
-    "fix": "npm run tslint -- --fix",
-    "lint": "tslint -c tslint.json 'types/**/*.d.ts' 'src/**/*.d.ts'",
+    "fix": "gts fix",
+    "lint": "gts lint",
     "npm-cli-login": "npm-cli-login",
     "prepare": "husky install",
     "start": "cd example && npm i && npm run start",
@@ -21,6 +21,8 @@
   "devDependencies": {
     "@types/d3": "^7.1.0",
     "@types/node": "^14.6.0",
+    "eslint-plugin-simple-import-sort": "^7.0.0",
+    "gts": "^3.1.0",
     "husky": "^7.0.4",
     "prettier": "^2.1.0",
     "pretty-quick": "^3.0.0",